Citation Nr: 1329331 Decision Date: 09/12/13 Archive Date: 09/20/13 DOCKET NO. 08-01 894 ) DATE ) ) On appeal from the Department of Veterans Affairs Regional Office in Montgomery, Alabama THE ISSUE Entitlement to service connection for a low back disorder, diagnosed as lumbar degenerative joint disease and spondylosis, with severe chronic desiccation and mild neuroforaminal encroachment at L5-S1, also claimed as secondary to service-connected residuals of bilateral os calcis fractures. REPRESENTATION Appellant represented by: Alabama Department of Veterans Affairs ATTORNEY FOR THE BOARD T. S. Kelly, Counsel INTRODUCTION The Veteran, who is also the appellant, had service in the U.S. Army Reserves, with active duty for training (ADT) from April 1966 to August 1966. He also served in the Alabama Army National Guard from October 1966 to July 1967, with various periods of ADT and inactive duty training (IADT) during that time. This matter originally came before the Board of Veterans' Appeals (Board) on appeal from a March 2006 rating determination of the Department of Veterans Affairs (VA) Regional Office (RO) located in Montgomery, Alabama. The Board remanded the case for further development in March 2011. The matter was once again remanded for further development in October 2012. The matter was again remanded for further development in April 2013. The requested development has been completed and the matter is now ready for appellate review. See Stegall v. West, 11 Vet. App. 268, 271 (1998) (noting the Board's duty to "insure [the RO's] compliance" with the terms of its remand orders). FINDING OF FACT Any current low back disorder, to include degenerative joint disease and spondylosis, with severe chronic desiccation and mild neuroforaminal encroachment at L5-S1, is not of service origin, did not manifest within a year of service separation, or is etiologically related to the service- connected bilateral os calcis, to include by way of aggravation. CONCLUSION OF LAW Any current low back disorder, to include degenerative joint disease and spondylosis, with severe chronic desiccation and mild neuroforaminal encroachment at L5-S1, did not pre-exist service, was not incurred in or aggravated by service nor may it be presumed to have been incurred therein, nor is it proximately due to, the result of, or aggravated by a service-connected disability. 38 U.S.C.A. §§ 101, 1101, 1110, 1111, 1153 (West 2002 & Supp. 2013); 38 C.F.R. §§ 3.6, 3.303, 3.306, 3.307, 3.309 (2012); 3.310 (2006). REASONS AND BASES FOR FINDING AND CONCLUSION Duty to Assist and Notify The Veterans Claims Assistance Act of 2000 (VCAA) and implementing regulations impose obligations on VA to provide claimants with notice and assistance. 38 U.S.C.A. §§ 5102, 5103, 5103A, 5107, 5126 (West 2002 & Supp. 2012); 38 C.F.R §§ 3.102, 3.156(a), 3.159, 3.326(a) (2012). Proper VCAA notice must inform the claimant of any information and evidence not of record (1) that is necessary to substantiate the claim; (2) that VA will seek to provide; (3) and that the claimant is expected to provide. 38 U.S.C.A. § 5103(a); 38 C.F.R. § 3.159(b)(1). For claims pending before VA on or after May 30, 2008, 38 C.F.R. § 3.159 has been amended to eliminate the requirement that VA request that a claimant submit any evidence in his or her possession that might substantiate the claim. 73 Fed. Reg. 23,353 (Apr. 30, 2008). The Board notes that the Veteran's status has been substantiated. The Board observes that in June 2005 and March 2011 letters, the RO provided the Veteran with notice that informed him of the evidence needed to substantiate his claim. The letters also told him what evidence he was responsible for obtaining and what evidence VA would undertake to obtain. The letters further told him to submit relevant evidence in his possession. The Court has also held that that the VCAA notice requirements of 38 U.S.C.A. § 5103(a) and 38 C.F.R. § 3.159(b) apply to all five elements of a service connection claim. Those five elements include: 1) veteran status; 2) existence of a disability; 3) a connection between the veteran's service and the disability; 4) degree of disability; and 5) effective date of the disability. Dingess/Hartman v. Nicholson, 19 Vet. App. 473 (2006). March 2006 and March 2011 letters also provided the Veteran with notice as to the disability rating and effective date elements of the claim. Although some of the notice letters were not sent before the initial RO decision in this matter, the Board finds that this error was not prejudicial to the Veteran because the actions taken by VA after providing the notice have essentially cured the error in the timing of notice. Not only has the Veteran been afforded a meaningful opportunity to participate effectively in the processing of his claim and been given ample time to respond, the RO has also readjudicated the case by way of a supplemental statement of the case issued after the notice was provided. See Prickett v. Nicholson, 20 Vet. App. 370, 376 (2006) (the issuance of a fully compliant VCAA notification followed by readjudication of the claim, such as a statement of the case or supplemental statement of the case, is sufficient to cure a timing defect). Furthermore, the Veteran and his representative have presented detailed argument which shows they are aware of what is needed to substantiate the claim. For these reasons, it is not prejudicial to the Veteran for the Board to proceed to finally decide this appeal because any error in the notice did not affect the essential fairness of the adjudication. See generally Shinseki v. Sanders, 129 S. Ct. 1696 (2009) (explaining application of the rule of prejudicial error in the context of claims for VA benefits). VA has a duty to assist a Veteran in the development of the claim. This duty includes assisting the Veteran in the procurement of service medical records and pertinent treatment records and providing an examination when necessary. 38 U.S.C.A. § 5103A; 38 C.F.R. § 3.159. All pertinent treatment records, service, VA, and private, have been obtained and associated with the claims folder insofar as possible. No other relevant records have been identified. The Board notes that this matter was remanded on several occasions to attempt to obtain opinions with regard to the etiology of any current back disorder and its relationship, if any, to his period of service. In conjunction with the most recent Board remands, the Veteran was afforded a VA examination in November 2012 and an addendum opinion along with an additional opinion from a VA podiatrist were provided in May 2013. The opinions provided, along with detailed rationale to support those opinions, comply with the Board remands. The Veteran has been afforded a meaningful opportunity to participate effectively in the processing of the claim, including by submission of statements and arguments presented by his representative and the opportunity to appear at a hearing if so desired. For these reasons, it is not prejudicial to the appellant for the Board to proceed to finally decide the appeal. Based upon the foregoing, the duties to notify and assist the Veteran have been met, and no further action is necessary to assist the Veteran in substantiating this claim. Service Connection for Low Back Disorder Service connection may be granted for a disability resulting from disease or injury incurred in or aggravated by active military, naval, or air service. 38 U.S.C.A. § 1110; 38 C.F.R. § 3.303(a). Service connection may be granted for any disease diagnosed after discharge, when all the evidence, including that pertinent to service, establishes that the disease was incurred in service. 38 C.F.R. § 3.303(d). As a general matter, service connection for a disability requires evidence of: (1) the existence of a current disability; (2) the existence of the disease or injury in service, and; (3) a relationship or nexus between the current disability and any injury or disease during service. Shedden v. Principi, 381 F.3d 1163 (Fed. Cir. 2004); see also Hickson v. West, 12 Vet. App. 247, 253 (1999), citing Caluza v. Brown, 7 Vet. App. 498, 506 (1995), aff'd, 78 F.3d 604 (Fed. Cir. 1996). The Veteran has claimed a low back disorder and the Veteran has been diagnosed with degenerative joint disease, which is a "chronic disease" listed under 38 C.F.R. § 3.309(a). Therefore, 38 C.F.R. § 3.303(b) applies in this case. Walker v. Shinseki, 708 F.3d 1331 (Fed. Cir. 2013). Where the evidence shows a "chronic disease" in service or "continuity of symptoms" after service, the disease shall be presumed to have been incurred in service. For the showing of "chronic" disease in service, there is required a combination of manifestations sufficient to identify the disease entity, and sufficient observation to establish chronicity at the time. With chronic disease as such in service, subsequent manifestations of the same chronic disease at any later date, however remote, are service- connected, unless clearly attributable to intercurrent causes. If a condition noted during service is not shown to be chronic, then generally, a showing of "continuity of symptoms" after service is required for service connection. 38 C.F.R. § 3.303(b). Additionally, where a veteran served ninety days or more of active service, and certain chronic diseases, such as arthritis, become manifest to a degree of 10 percent or more within one year after the date of separation from such service, such disease shall be presumed to have been incurred in service, even though there is no evidence of such disease during the period of service. 38 U.S.C.A. §§ 1101, 1112, 1113, 1131, 1137; 38 C.F.R. §§ 3.307, 3.309(a). While the disease need not be diagnosed within the presumption period, it must be shown, by acceptable lay or medical evidence, that there were characteristic manifestations of the disease to the required degree during that time. Id. Active military, naval, or air service includes any period of active duty for training (ACDUTRA) during which the individual concerned was disabled from a disease or injury incurred in the line of duty. 38 U.S.C.A. § 101(21), (24); 38 C.F.R. § 3.6(a). Active military, naval, or air service also includes any period of inactive duty training (INACDUTRA) during which the individual concerned was disabled from an injury incurred in the line of duty. Id. Accordingly, service connection may be granted for disability resulting from disease or injury incurred in, or aggravated, while performing ACDUTRA or from injury incurred or aggravated while performing INACDUTRA. 38 U.S.C.A. §§ 101(24), 106, 1110. A veteran will be considered to have been in sound condition when examined, accepted and enrolled for service, except as to defects, infirmities, or disorders noted at entrance into service, or where clear and unmistakable (obvious or manifest) evidence demonstrates that an injury or disease existed prior thereto. Only such conditions as are recorded in examination reports are to be considered as noted. 38 U.S.C.A. §§ 1111, 1131, 1132; 38 C.F.R. § 3.304(b). Service connection may also be granted for a disability on the basis of aggravation. 38 U.S.C.A. § 1110; 38 C.F.R. §§ 3.303(a), 3.304, 3.306. A preexisting injury or disease will be considered to have been aggravated by active military, naval, or air service, where there is an increase in disability during such service, unless there is a specific finding that the increase in disability is due to the natural progress of the disease. 38 C.F.R. § 3.306(a). Clear and unmistakable evidence (obvious or manifest) is required to rebut the presumption of aggravation if the pre service disability underwent an increase in severity during service. This includes medical facts and principles which may be considered to determine whether the increase is due to the natural progress of the condition. 38 C.F.R. § 3.306(b). Simply put, if a preexisting disorder is noted upon entry into service, the Veteran cannot bring a claim for service connection for that disorder, but he may bring a claim for service-connected aggravation of that disorder. In that case 38 U.S.C.A. § 1153 applies and the burden falls on the Veteran to establish an increase in disability during service. See Jensen v. Brown, 19 F.3d 1413, 1417 (Fed. Cir. 1994). A preexisting injury or disease will be considered to have been aggravated during service when there is an increase in disability during service. 38 U.S.C.A. § 1153; 38 C.F.R. § 3.306(a). If increased disability is established, then the burden shifts to the government to show a lack of aggravation by establishing, by clear and unmistakable evidence, that the increase in disability is due to the natural progress of the disease. 38 U.S.C. § 1153; see also 38 C.F.R. § 3.306(b); Jensen, 19 F.3d at 1417. Temporary or intermittent flare-ups of a preexisting injury or disease are not sufficient to be considered "aggravation in service" unless the underlying condition itself, as contrasted with mere symptoms, has worsened. See Jensen v. Brown, 4 Vet. App. 304, 306-07 (1993). Service connection may also be granted for disability which is proximately due to or the result of a service-connected disease or injury. 38 C.F.R. § 3.310; Allen v. Brown, 7 Vet. App. 439, at 448 (1995) (holding that service connection on a secondary basis requires evidence sufficient to show that the current disability was caused or aggravated by a service-connected disability). To establish secondary service connection, the law states that there must be (1) evidence of a current disability; (2) evidence of a service- connected disability; and (3) nexus evidence establishing a connection between a service-connected disability and the current disability. See Wallin v. West, 11 Vet. App. 509, 512 (1998). The Board notes that there was an amendment to 38 C.F.R. § 3.310, effective October 10, 2006. 71 Fed. Reg. 52,744 - 47 (Sept. 7, 2006). The amendment sets a standard by which a claim based on aggravation of a non-service-connected disability by a service-connected one is judged. Although VA has indicated that the purpose of the regulation was merely to apply the ruling of the Court of Appeals for Veterans Claims (Court) in Allen, it was made clear in the comments to the regulation that the changes were intended to place a burden on the claimant to establish a pre- aggravation baseline level of disability for the non- service-connected disability before an award of service connection may be made. This had not been VA's practice, which suggests that the change amounted to a substantive change. Given what appear to be substantive changes, and because the Veteran's claim was pending before the regulatory change was made, the Board will consider the more favorable version of 38 C.F.R. § 3.310 in effect before the amendment. The Veteran contends that he has low back pain that is secondary to his service-connected residuals of bilateral os calcis fractures. Specifically, he avers that his bilateral os calcis fractures have caused him to walk in such a way that has caused low back pain. In the alternative, he contends that he injured his low back at the same time he fractured his heels in May 1966 while on active service. Service treatment records indicate the existence of back problems prior to enlistment in April 1966. The December 1965 service enlistment examination report indicates that the Veteran had injured his back in a 1955 motor vehicle accident. The Veteran also checked "yes" next to arthritis or rheumatism on his Report of Medical History, but the examining physician wrote "no arthritis" in the physician's summary section of the report. Moreover, clinical examination of the back was marked as "normal." Service treatment records indicate in April 1966, the Veteran was admitted for an arthritis work-up. He reported pain in his neck and upper back, and stated that marching caused pain in his hips, ankles, knees, elbows, back, and neck. At discharge from the hospital, it was noted that there was no clinical evidence of arthritis. In May 1966, the Veteran reported painful heels, and an X- ray study revealed bilateral March (or stress) fracture of the os calcis. At the July 1966 separation examination, the Veteran continued to report cramps in his legs as well as arthritis or rheumatism on his Report of Medical History, stating that he was treated for gouty arthritis in December 1965 (prior to service enlistment). The examining physician noted, however, that the Veteran was checked for gout in service and was told that he had myositis rather than gouty arthritis. The examining physician also indicated that the Veteran had swollen joints/arthritis with occasional swelling and pain in his ankles and wrists since the age of fourteen, with no joint deformity. Clinical examination of the lower extremities and spine was marked as "normal." Following separation from ADT in August 1966, as noted above, the Veteran had service with the Alabama Army National Guard from October 1966 to July 1967. The October 1966 National Guard enlistment examination report is negative for any back problems, findings, or diagnoses. The Veteran checked "no" next to recurrent back pain, and arthritis or rheumatism on the Report of Medical History, and clinical examination of the back was marked as "normal." At the June 1967 separation examination, however, the Veteran checked "yes" next to recurrent back pain, and arthritis or rheumatism, on his Report of Medical History. On physical examination, it was noted that the Veteran had extreme soreness of the heels with excessive walking, and cervical spine tenderness to pressure. Otherwise, physical examination of the back was normal. At the time of a July 1970 VA examination, the Veteran reported that his heels hurt when he stood. Gait was reported as normal at that time. There were no reports or findings of back problems at that time. In a January 1977 treatment record, it was noted that the Veteran reported that he had been told that he had cervical spondylitis. Physical examination performed at that time revealed full range of motion for all joints without swelling, tenderness, heat, effusion, etc. At the time of a May 1984 VA examination, cervical and lumbar curvatures were well preserved. There were no spasms of the paravertebral muscles and no scoliosis of the spine. Range of motion for the spine was full. In support of his claim, the Veteran submitted statements from various individuals. In a March 2003 letter, D. O., indicated that he had known the Veteran all his life. He indicated that the Veteran had developed problems in his ankles and it was very hard for him to stand. At the time of September 2003, January 2004, and March 2004 outpatient visits, normal gait findings were reported along with no tenderness of palpation on the spine. In a July 2005 letter, C.H., M.D., indicated that the Veteran had been a patient of his for some time now with chronic foot pain due to injuries sustained while he was in the Army. The Veteran had bilateral calcaneal fractures and had degenerative changes from that and chronic foot pain. Dr. H. also noted that due to the way the Veteran had to walk related to that, he had developed degenerative joint disease in his back and had nerve impingement from his disk and chronic pain syndrome that was managed with Lortab and Xanax therapy on a routine basis. He stated that he felt like the foot problems had exacerbated the problems related to his back in that they some way acted synergistically to cause his pain. The Veteran was afforded a VA examination in February 2006. The examiner noted the July 2005 letter from Dr. H. The examiner indicated that the Veteran reported fracturing his heels when going through the obstacle course and hurting his back at the same time. The examiner rendered a diagnosis of lumbosacral strain with severe decreased range of motion and function from resistance. The examiner opined that it was not as likely as not that the Veteran's back condition (diagnosed as degenerative joint disease of the lumbosacral spine with mild neuroforaminal encroachment at L5-S1) was related to his service-connected os calcis fractures, because the examiner noted that the Veteran reported that when he was on an obstacle course during basic training, he landed on his feet as well as his back. Based on the Veteran's statement that the injury to the feet and back occurred at the same time, the VA examiner concluded that it was as likely as not that the current low back condition was related to the same in-service injury in which the Veteran injured his heels. In a December 2007 letter, Dr. H. noted that, during basic training, the Veteran had jumped off of a training device into some sawdust and sand, breaking his heel bones and jamming his back. Dr. H. indicated that the Veteran reported chronic foot and back pain since that injury. He opined that the Veteran's current low back pain was continuous since active service and was related to the in- service injury in which he broke his heel bones. In March 2011, the Board remanded this matter for further development. Pursuant to the Board's remand, the Veteran was afforded VA orthopedic and neurologic examinations in October 2011. The VA examiner concluded that there was no evidence of peripheral nerve damage or radiculopathy. He stated that the Veteran's back condition was less likely than not incurred in or caused by any event, injury, or illness during active service, noting that there was no documentation of treatment for the low back in the service treatment records, including after the incident in which the Veteran fractured his heel bones. The examiner further indicated that the low back condition was at least as likely as not caused by the service-connected bilateral os calcis fractures but he did not provide any rationale for this opinion. In May 2012, the RO obtained an addendum opinion from the October 2011 VA examiner. In the addendum report, the examiner opined that the low back condition clearly and unmistakably preexisted entrance into active service, as indicated by the notation in the enlistment examination report of a back injury in a 1955 motor vehicle accident, and that the low back condition was clearly and unmistakably not aggravated by active service, as indicated by the lack of documentation of low back treatment or complaints in the service treatment records. The VA examiner then checked the box on the Disability Benefits Questionnaire indicating that the low back condition was "at least as likely as not...incurred in or caused by the claimed in-service injury, event, or illness." However, in the rationale section, the VA examiner reported that the Veteran's current back condition "...is as less likely as not caused by or aggravated by the Veteran's service-connected residuals of the left and right os calcis fractures. There is no causal relationship between th[e] Veteran's service-connected residuals of left and right os calcis fractures and the low back." In its October 2012 remand, the Board found that the October 2011 VA examination and May 2012 addendum reports were inadequate, and that a new VA examination was necessary with regard to the low back disorder claim. The Board observed that the October 2011 VA examiner's opinions regarding whether the low back disorder was related to either active service or to the service-connected bilateral os calcis fractures were conflicting and inadequate. It observed that the examiner contradicted herself in several parts of the examination report. The Board also found that the October 2011 VA examiner did not provide any rationale for her initial opinion (which was later contradicted by her statement that there was no relationship between the bilateral heel disability and the current back disorder) that the low back disorder was likely related to the bilateral heel disability. Finally, the Board noted that the Veteran has been diagnosed with various conditions involving the low back, and these various conditions had not been clearly delineated (e.g., which joints are affected by arthritis or myositis, etc.). In light of the various diagnoses, and the contradictions and missing opinions in the October 2011 VA examination report and the May 2012 addendum, the Board found that a new VA examination was necessary to assist in determining the exact nature and etiology of any and all low back disorders, including whether any of them were directly incurred in or related to an event or injury during active service, secondary to the service-connected residuals of bilateral fractures of the os calcis, or whether they preexisted active service and were aggravated therein. The Board requested that the Veteran be afforded a VA orthopedic examination to address the causation or etiology of any current low back disorder. As to the claimed back disorder, the Board requested that the examiner offer an opinion as to whether there was clear and unmistakable evidence that the Veteran had a low back disorder which pre- existed his entrance into military service in 1966, and, if so, what was the nature of such disability. The examiner was requested to address the service treatment records which indicated the Veteran injured his back in a 1955 motor vehicle accident, that he experienced back pain during active service in May 1966, and the notation of gouty arthritis or myositis at separation. The Board stated that if it was the examiner's opinion that a low back disorder pre-existed the Veteran's entrance into military service, he/she should then offer an opinion as to whether there was clear and unmistakable evidence that the preexisting low back disorder was not aggravated during service, and if there was in-service aggravation, what was the pre-existing baseline level of the disability prior to such aggravation. When answering these questions, the examiner was to comment on the notation of back pain in the service treatment records in May 1966 and the notation of gouty arthritis or myositis at separation. The Board then noted that if it was the examiner's opinion that the Veteran's low back disorder did not pre-exist service, he/she should offer an opinion as to whether it was at least as likely as not that the Veteran's currently diagnosed low back disorder(s) was/were incurred during or caused by active service. The examiner was requested to comment on the Veteran's assertion (supported by the February 2006 VA examiner and a December 2007 letter from Dr. H.) that he "jammed" his back while jumping during the same injury in which he injured his heels during service in May 1966. The Board also requested that the examiner offer an opinion as to whether it was at least as likely as not that any current low back disorder had been caused or aggravated by the Veteran's bilateral os calcis disabilities. The examiner was requested to address the Veteran's contention (supported by a July 2005 letter from Dr. H.) that the manner in which he had to walk due to his bilateral os calcis disabilities caused or aggravated his current low back disorder. If the examiner opined that the Veteran's low back disorder was aggravated by his bilateral os calcis disabilities, the examiner was requested to attempt to identify the baseline level of severity of the low back disorder before the onset of aggravation. In conjunction with the Board remand, the Veteran was afforded the requested VA examination in November 2012. The examiner indicated that the claims folder was available and had been reviewed. The examiner rendered diagnoses of osteoarthritis and degeneration of the lumbar or lumbosacral intervertebral disc. Following examination, the examiner indicated that the Veteran's lumbar conditions were less likely than not incurred in or caused by the claimed in- service injury, event, or illness. The examiner also indicated that it was less likely than not that the Veteran's back conditions pre-existed his period of service. As to the issue of direct service incurrence, the examiner indicated that the Veteran's current back disorders were less likely than not related to an in-service diagnosis, or injury. The examiner noted that the service treatment records did not support a single jumping injury so the Veteran's contention that he was injured with this "jumping injury" did not match the objective documentation in the service treatment records. She noted that while the Veteran implied a specific injury while jumping in which injured his heels as well as his back, the medical records did not document this type of injury. Furthermore, the Veteran's type of heel fractures, being "march fractures" were a repetitive type of injury (low impact) and not the type of injury that was normally sustained with a single jump injury (high impact). She indicated that as the Veteran's march fractures were the type of repetitive motion injury to feet, the contention that he jammed his back when he jumped and injured his feet (a one-time event) did not match the mechanism of a low-impact, repetitive motion, as documented objectively by the service treatment records and type of fracture shown by x-ray. She further noted that the arthritis evaluation during military service also revealed no back/spine diagnoses of pathology (which would have been fully evaluated as the Veteran was complaining of back and neck pain). In support of her opinion that the Veteran's back disorder less likely than not pre-existed service, the examiner noted that the Veteran had no complaints of ongoing back pain when entering service. Furthermore, a full arthritis evaluation was done in the military which revealed no arthritis. She noted that the Veteran's back would have been evaluated as part of the full arthritis examination. The examiner also indicated that the Veteran did not have any evidence of gout and that even though the term "gout" appeared in the record in his initial VA examination after service, there was no laboratory evidence supporting this diagnosis then or now. The examiner also noted that the Veteran was termed with "myositis" during military service, but this was used to indicate a non-specific muscle pain. She stated that without evidence of laboratory elevation of CPK, this term was incorrectly applied. She noted that the term "myalgia", meaning "pain in the muscles" or even "muscle spasm", was a diagnosis which could have been applied at the time of diagnosis, but myositis was a specific term which was incorrectly used as there was not any laboratory evidence to support that diagnosis. She indicated that the Veteran could not be said to have myositis. The examiner further opined that as it was less likely than not that the Veteran's back conditions pre-existed service, the question of service aggravation of a pre-existing back disability was a moot point. However, as to the issue of entitlement to service connection for a low back disorder as secondary to service- connected residuals of bilateral os calcis fractures, the opinion provided was insufficient and did not comply with the requested opinions/answers required by the Board in its October 2012 remand. The examiner did not provide an opinion as to whether the Veteran's back disorders were proximately due to or the result of his service-connected bilateral os calcis. The examiner also did not check the required box in item 5 concerning this question nor did she provide any rationale with regard to this question. As to the question of aggravation by a service-connected os calcis condition, the examiner stated that she could not determine a baseline level of severity of the claimed back disorder based upon medical evidence prior to aggravation or the earliest medical evidence following aggravation by the service-connected os calcis. The examiner then checked the "no" box when asked whether regardless of an established baseline, was the Veteran's back disorder at least as likely as not aggravated beyond its natural progression by the service-connected os calcis. In the rationale section, the examiner indicated that the Veteran's heel fractures had caused some disability, but the Veteran's primary back disabilities were significant enough to account for his pain and back disabilities. The examiner noted that the Veteran did not have significant enough gait alteration from his bilateral calcaneal disabilities to account for aggravation of his back condition beyond the back conditions' natural progression. In April 2013, the Board remanded this matter for an addendum report on the question of secondary service connection. The Board requested that if available, return the claims folder to the November 2012 VA examiner to request an opinion as whether it is at least as likely as not (50 percent or greater probability) that the diagnosed back disorders were proximately due to or the result of the Veteran's service-connected bilateral os calcis. When rendering the opinion, the examiner was to address the July 2005 letter from Dr. H., who noted that due to the way the Veteran had to walk related to his os calcis fractures he had developed degenerative joint disease in his back and had nerve impingement from disk and chronic pain syndrome that was managed with Lortab and Xanax therapy on a routine basis. The examiner was also to provide detailed rationale for this opinion. If the November 2012 examiner was not available, the claims folder be reviewed by another VA examiner, with the examiner rendering the requested opinion along with detailed rationale to support that opinion. In May 2013, the requested opinion was provided by another VA examiner. The examiner indicated that the Veteran's claims folder was available and had been reviewed. The examiner, an orthopedic surgeon, opined that the claimed condition was less likely than not proximately due to or the result of the Veteran's service-connected condition. The examiner indicated that the preponderance of the medical literature did not relate the diagnosed back condition to any os calcis disorder. In an additional May 2013 VA opinion from a VA podiatrist, it was indicated that the Veteran's claims file had been reviewed. The examiner stated that it was less likely than not that the Veteran's claimed low back disorder, diagnosed as lumbar degenerative joint disease and spondylosis with severe chronic desiccation and mild neuroforaminal encroachment at L5-S1, claimed as secondary to service- connected residuals of bilateral os calcis fractures was proximately due to, nexus of, aggravated by or aggravated beyond its natural and normal aging process. The examiner indicated that this was based upon a comprehensive review of the clinical file, radiographs, CAPRI, and current medical literature. In support of her opinion, the examiner noted that the Veteran was diagnosed with probable stress (march) fractures of his right and left heels while in his first few months of training. She stated that typically a stress fracture of the foot happens because of prolonged, repeated pressure on the foot. Usually the fracture occurs in the lower leg and foot. This type of stress fracture often affects the calcaneus, navicular or metatarsal bones. She noted that the current radiographs of the heels did not demonstrate residuals from stress fractures. The bone stock and alignment of the structural configuration were normal. Second, there was no medical based scientific evidence for a nexus of heel spurs with a past medical history of stress fractures. She noted that as Roots discussed in his book on biomechanical function of the foot, heel spurs are due to the pull of the plantar fascia from its insertion on the medical process of the calcaneal tuberosity. Therefore, there was no relationship of stress fractures to the formation of heel spurs. The examiner further observed that there was no diagnosis, treatment, or confirmed injury to the lower back in the active duty records and that there was no diagnosis of gout in the active duty records. The examiner also indicated that anatomically, the calcaneal bones of the feet were not related to the lower back and that upon careful review of the current medical literature, there was no medically based scientific literature to support such a claim. The examiner stated that she was in full in agreement with the May 2013 VA examiner's opinion that the claimed condition was less likely than not proximately due to or the result of the Veteran's service-connected condition. The examiner also indicated that she was in agreement with the May 2012 VA examiner's opinion that the claimed condition was less likely than not caused by the claimed in-service injury, event, or illness and that there was no causal relationship between the Veteran's bilateral heel fracture and his back condition. She stated that in her opinion, the 2005 letter from Dr. H. was a personal opinion not grounded in medically based scientific evidence. Therefore, she was in total disagreement with his personal conclusions. Furthermore, the claimed back condition was less likely than not aggravated by the stress fractures of the heels. She stated that there was no medically based scientific evidence to support a claim of aggravation or aggravation beyond its normal and natural aging process. The Board finds that the weight of the competent, probative and credible evidence does not demonstrate that symptoms of the claimed low back disorder were chronic in service or continuous since service. Service treatment records indicate the existence of back problems prior to enlistment in April 1966, with the December 1965 service enlistment examination report indicating that the Veteran had injured his back in a 1955 motor vehicle accident, and with the Veteran checking the yes box next to arthritis or rheumatism on his Report of Medical History; however, the examining physician wrote "no arthritis" in the physician's summary section of the report. Moreover, clinical examination of the back was marked as "normal." Thus, the Board concludes that the presumption of soundness attaches, as no current disorders of the low back were noted at service entrance. See Crowe v. Brown, 7 Vet. App. 238 (1994). Furthermore, while the Veteran was admitted for an arthritis work-up in April 1966, on discharge from the hospital it was noted that there was no clinical evidence of arthritis. Moreover, while the Veteran continued to report having arthritis or rheumatism on his June 1966 Report of Medical History, stating that he was treated for gouty arthritis in December 1965 (prior to service enlistment), the examining physician noted that the Veteran was checked for gout in service and was told that he had myositis rather than gouty arthritis, with clinical examination of the spine being marked as normal. In addition, the October 1966 National Guard enlistment examination report is negative for any back problems, findings, or diagnoses and the Veteran checked the "no" boxes when asked if he had arthritis or rheumatism on the Report of Medical History, with clinical examination of the lower extremities and back being marked as "normal." Also while the Veteran checked the "yes" boxes next to recurrent back pain and arthritis or rheumatism on his June 1967 Report of Medical History, physical examination performed at that time revealed that the Veteran had extreme soreness of the heels with excessive walking, and cervical spine tenderness to pressure, with otherwise normal back findings. Moreover, although it was noted in a January 1977 treatment record that the Veteran had been told that he had cervical spondylitis, physical examination performed at that time revealed full range of motion for all joints without swelling, tenderness, heat, effusion, etc. In addition at the time of a May 1984 VA examination, cervical and lumbar curvatures were found to be well preserved and there were no spasms of the paravertebral muscles and no scoliosis of the spine, with full range of motion for the spine. There were no findings of diagnosed back disorders, until many years following service. Therefore, the clinical evidence does not reflect either an in-service low back injury or continuity of symptomatology, for reasons clearly noted above, with significant evidence against such a finding. Additionally, arthritis of the spine did not manifest within a year of service separation. The Board, however, must also consider the lay evidence of record in determining whether there is continuity of symptoms. The Board has considered the statements of the Veteran, noting that the Veteran is considered competent to report back symptoms such as low back pain because this requires only personal knowledge as it comes to him through his senses. Layno, 6 Vet. App. at 470. However, competency of evidence differs from weight and credibility. The former is a legal concept determining whether testimony may be heard and considered by the trier of fact, while the latter is a factual determination going to the probative value of the evidence to be made after the evidence has been admitted. Cartright v. Derwinski, 2 Vet. App. 24, 25 (1991) ("although interest may affect the credibility of testimony, it does not affect competency to testify"). In determining whether statements submitted by a veteran are credible, the Board may consider internal consistency, facial plausibility, and consistency with other evidence submitted on behalf of the claimant. Caluza v. Brown, 7 Vet. App. 498 (1995). The Board is not required to accept a veteran's uncorroborated account of his active service experiences. Wood v. Derwinski, 1 Vet. App. 190 (1991). It is not disputed that the Veteran has reported back pain since his period of service. However, as noted above, the Veteran was afforded numerous examinations in conjunction with his complaints which revealed normal clinical findings. Moreover, treatment records which have been associated with the claims folder make no reference to any findings of arthritis until years following service. See Maxson v. Gober, 230 F.3d 1330, 1333 (Fed. Cir. 2000) (lengthy period of absence of medical complaints for condition can be considered as a factor in resolving claim); see also Mense v. Derwinski, 1 Vet. App. 354, 356 (1991) (affirming Board's denial of service connection where veteran failed to account for lengthy time period between service and initial symptoms of disability). As to any conflicting evidence, the November 2012 VA examiner indicated that the Veteran did not have any evidence of gout even though the term "gout" appeared in the record in his initial VA examination after service; there was no laboratory evidence supporting this diagnosis then or now. She further observed that an arthritis evaluation was also done in 1966 and was negative for any arthritis. She also noted that the Veteran was termed with "myositis" during service, but this was used to indicate nonspecific muscle pain and without evidence of laboratory elevation of CPK, this term was incorrectly applied as there was not any laboratory evidence to support that diagnosis. She also stated that the term "myalgia" meaning "pain in muscles" or even "muscle spasm" were also diagnoses which could have been applied at the time of diagnosis. She stated that the Veteran could not therefore be said to have had myositis either. The examiner further indicated that it was less likely than not that the Veteran's back conditions pre- existed service; therefore, the question of service aggravation of a pre-existing back disability was a moot point. For the above reasons, continuity has not here been established, either through the clinical record or through the Veteran's own statements. While the Veteran is competent to report low back pain, his accounts of continuity of such pain since service are not considered credible in light of the lack of complaints of such pain within the record until recently, as outlined above. As to the Veteran's belief that his current low back disorders are related to his period of service, the Board acknowledges the holding of the U.S. Court of Appeals for the Federal Circuit in Jandreau v. Nicholson, 492 F.3d 1372 (Fed. Cir. 2007). Here, however, the question of causation extends beyond an immediately observable cause-and-effect relationship and, as such, the Veteran is not competent to address etiology in the present case. Likewise, statements received from the Veteran's friends/co-workers/fellow soldiers, also do not provide a competent nexus between any currently diagnosed back disorder and the Veteran's period of service. Neither the Veteran nor the authors of the lay statements have been shown to possess the required expertise to render such an opinion. Next, service connection may be granted when the evidence establishes a nexus between active duty service and current complaints. When evaluating the weight of medical evidence, the Board is guided by the principle that the probative value of a medical opinion largely rests upon the extent to which such opinion is based upon a thorough evaluation of the Veteran's medical history, including but not limited to the medical evidence contained in the claims file. See, e.g. Miller v. West, 11 Vet. App. 345, 348. The Board may examine the factual foundation of a medical opinion, including whether the physician had access to relevant information of record. Nieves-Rodriguez v. Peake, 22 Vet. App. 295, 303-304 (2008). The Board notes that the Veteran's private physician, Dr. H., in a 2007 statement indicated that based upon the Veteran's statement, the injury to the feet and back occurred at the same time. The Board further observes that the February 2006 VA examiner indicated that was as likely as not that the current low back condition was related to the same in-service injury in which the Veteran injured his heels based upon statements received from the Veteran. The Board notes that the service treatment records do not make reference to any back injury in conjunction with any foot problems. The weight of a medical opinion is diminished where that opinion is ambivalent, based on an inaccurate factual premise, based on an examination of limited scope, or where the basis for the opinion is not stated. See Reonal v. Brown, 5 Vet. App. 458, 461 (1993); Sklar v. Brown, 5 Vet. App. 140 (1993). In contrast, the Board notes that the November 2012 VA examiner, following a comprehensive examination of the Veteran and a thorough review of the claims folder, indicated that the Veteran's currently diagnosed low back disorders were less likely than not related to any in- service event or injury. The Board is giving this opinion the most probative weight. The Veteran's entire claims file, which at the time included his service treatment records, private and VA treatment records, and the statements from Dr. H. and the previous VA examiners, was reviewed. Based on all of the evidence, the examiner rendered an opinion that was supported by a detailed and complete rationale. There was no indication that the VA examiner was not fully aware of the Veteran's past medical history or that she misstated any relevant fact. Thus, the Board finds this opinion to be the more probative evidence of record. In sum, the preponderance of the evidence weighs against a finding that any current low back disorders developed in service or in the one year following service, or is otherwise related to his period of service. As to the question of secondary service connection, as noted above, the Veteran is not competent to render an opinion as to the whether his current back disorders are proximately due to or related to the service-connected os calcis. Likewise, the individuals who submitted statements in support of his claim have also not been shown to have the requisite expertise to render such an opinion. The Board does note that Dr. H. in his July 2005 letter, stated that he felt like the foot problems had exacerbated the problems related to his back in that they some way acted synergistically to cause his pain. The Board further notes the October 2011 VA examiner's opinion that the low back condition was at least as likely as not caused by the service-connected bilateral os calcis fractures. As to Dr. H's opinion, the Board notes that while he rendered an opinion that appeared to relate the two, he did not provide detailed rationale to support his opinion, indicating that they in some way synergistically reacted to cause pain without further explanation. The October 2011 VA examiner provided no rationale to support the opinion. Additionally, neither examiner discussed the numerous mentions within the record of the Veteran's gait as being within normal limits. Such findings cast doubt on the assertion that a gait abnormality caused or contributed to a current spinal disorder. As noted above, the weight of a medical opinion is diminished where that opinion is ambivalent, based on an inaccurate factual premise, based on an examination of limited scope, or where the basis for the opinion is not stated. See Reonal, 5 Vet. App. at 461 (1993); Sklar v. Brown, 5 Vet. App. at 140 (1993). In contrast, the May 2013 VA podiatrist, indicated that it was less likely than not that the Veteran's claimed low back disorder, diagnosed as lumbar degenerative joint disease and spondylosis with severe chronic desiccation and mild neuroforaminal encroachment at L5-S1, claimed as secondary to service-connected residuals of bilateral os calcis fractures was proximately due to, nexus of, aggravated by or aggravated beyond its natural and normal aging process. The examiner provided in-depth rationale to support her opinion. There was no indication that the VA examiner was not fully aware of the Veteran's past medical history or that she misstated any relevant fact. Thus, the Board finds this opinion to be the more probative evidence of record. In sum, the preponderance of the evidence weighs against a finding that any current low back disorders were caused or aggravated by the Veteran's service-connected bilateral os calcis fractures. As to the question of whether the Veteran had a low back disorder which pre-existed and was aggravated by service, the Board notes that while certain notations were made at the time of the Veteran's enlistment examination, the November 2012 VA examiner, following a thorough review of the claims folder and a comprehensive examination of the Veteran indicated that there was not clear and unmistakable evidence that there was a pre-existing back disorder. The examiner provided detailed rationale for her opinion, addressing each disorder which was noted to have possibly existed prior to service, and citing to specific evidence in the service treatment records to support her opinion. Based on all of the evidence, the examiner rendered an opinion that was supported by a detailed and complete rationale. There was no indication that the VA examiner was not fully aware of the Veteran's past medical history or that she misstated any relevant fact. Thus, the Board finds this opinion to be the more probative evidence of record. In sum, the preponderance of the evidence weighs against a finding that any current low back disorder, to include lumbar degenerative joint disease and spondylosis, with severe chronic desiccation and mild neuroforaminal encroachment at L5-S1, pre-existed service and was subsequently aggravated by service; developed in service or in the one year following service, or is otherwise related to his period of service; or was proximately due to or the result of, to include way of aggravation, his service- connected bilateral os calcis. As the preponderance of the evidence is against the claim, the benefit of the doubt rule is not applicable. ORDER Service connection for a low back disorder, diagnosed as lumbar degenerative joint disease and spondylosis, with severe chronic desiccation and mild neuroforaminal encroachment at L5-S1, is denied. ____________________________________________ T. D. JONES Acting Veterans Law Judge, Board of Veterans' Appeals Department of Veterans Affairs