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CAUSATION

See  AccidentOccupational Disease

If the evidence shows that it is just as probable that the disability resulted from a cause which is not compensable, as it is that it resulted from one which is compensable, the claimant has not sustained his burden of proof. Bergmann v. L&W Drywall, 222 Va. 30, 32, 278 S.E.2d 801, 802 (1981). But where a disability has two causes: one related to the employment and one unrelated to the employment, full benefits will be allowed. Bergmann v. L&W Drywall, 222 Va. 30, 32, 278 S.E.2d 801, 803 (1981). The "two causes rule" addresses those cases "where a disability has two causes: one related to the employment and one unrelated." Smith v. Fieldcrest Mills, Inc., 224 Va. 24, 28, 294 S.E.2d 805, 808 (1982) (quoting Bergmann v. L & W Drywall, 222 Va. 30, 32, 278 S.E.2d 801, 803 (1981)); see also Shelton v. Ennis Business Forms, 1 Va. App. 53, 55, 334 S.E.2d 297, 299 (1985). Under the two causes rule, "full benefits [are] allowed when it is shown that `the employment is a contributing factor." Smith, 224 Va. at 28-29, 294 S.E.2d at 808 (quoting Bergmann, 222 Va. at 32, 278 S.E.2d at 803); see also Shelton, 1 Va. App. at 55, 334 S.E.2d at 299. The "more probable than not rule," addresses those cases where only one of a number of possible factors caused the disability. See id. Under the more probable than not rule, for the disability to be compensable, it must be more probable than not that it was caused by the work-related factor. Id. That is, a preponderance of evidence must show that work-related factor was the cause of the disability. Id.

A claimant's proof of the required causal connection must go beyond mere conjecture. Southall v. Eldridge Reams, Inc., 198 Va. 545, 548, 95 S.E.2d 145, 147 (1956)."Possibility is not enough," when proving causation. Eccon Company v. Lucas, 221 Va. 786, 791, 273 S.E.2d 797, 799 (1981); Rust Engineering Co. v. Ramsey, 194 Va. 975, 76 S.E.2d 195 (1953) ; Wellmore Coal Corporation v. Dallas E. McClanahan, Record No. 1922-98-3 (March 16, 1999). WP Version.

A Possible Causal Connection is Not Enough. The Workers' Compensation Commission did not err in finding that claimant failed to prove that certain medical expenses incurred by her since 1996 were causally related to either her August 3, 1979 or August 13, 1981 compensable injuries by accident. Claimant relies solely upon a letter from an orthopedic surgeon stating, “It is possible that the cervical spine problem did contribute to the patients [sic] shoulder and scapula problems as the two are often related.” This doctor did not express his opinion regarding causation with any degree of reasonable probability or medical certainty.  Rather, he merely raised the "possibility" of a causal relationship.  It is well established that "[a] medical opinion based on a 'possibility' is irrelevant [and] purely speculative."  Spruill v. Commonwealth, 221 Va. 475, 479, 271 S.E.2d 419, 421 (1980). the commission was entitled to conclude that the evidence failed to prove that the medical treatment at issue was causally related to either of claimant's compensable work-related accidents. Joyce Ann Myers v. Anheuser Busch, Inc., Record No. 1428-99-1 (November 23, 1999). WP Version.

Evidence in the record was sufficient to prove that claimant's 1993 compensable back injury caused the current condition suffered by the claimant. The claimant's symptoms were in the same locations as the symptoms from the original injury, his symptoms persisted to the present, and he remained under the same doctor's treatment since 1993. The commission had awarded the claimant temporary total disability awards through June 16, 1996, thereby establishing the causal relationship at least through that date. There was no evidence of any new specific intervening injury. Although claimant's doctor gave an affirmative response to a question asking whether he agreed that it was just as probable the L5 disc rupture was caused by cumulative or specific events at his new employment as attributable to the 1993 work accident, the doctor also stated, "Patient current complaints are related to 3-29-93 injury." Other notes refer to the new herniation as a "recurrent L5 disc herniation." Wellmore Coal Corporation v. Dallas E. McClanahan, Record No. 1922-98-3 (March 16, 1999). WP Version.

The commission did not err in finding that claimant proved that his herniated lumbar disc was causally related to his September 2, 1997 injury by accident. The medical record repeatedly refers to the onset of symptoms following a work-related lifting incident on September 2, 1997. The claimant informed the physicians that he performed heavy labor and injured his back and he reported chronic symptoms for three months. The claimant told his supervisor about the injury and told a doctor about a previous injury in August 1996 but that the injury resolved. Claimant did not have any problem after that until September 1997. A doctor informed another doctor "of back pain which seems to date to September of 1997. . . ." This doctor detailed a history of lifting a 12-inch block on September 2, 1997, and then an onset of acute low back pain. He noted that the claimant continued to work and that the symptoms varied with his work activities. Other health care providers have also reported the September 1997 work injury as the source of the current symptoms.   He has had progressive pain since that time. Claimant's testimony, coupled with the medical records and histories the doctors, constitutes credible evidence from which the commission could reasonably infer that claimant's herniated disc was causally related to the September 2, 1997 injury by accident. Berry Enterprises, Inc. v. Rodney A. Johnson, Record No. 1213-99-3 (October 5, 1999). WP Version.

The commission did not err in finding that claimant proved that her cervical disc condition and March 2, 1998 surgery were causally related to her compensable July 17, 1996 injury by accident. The accident resulted in a cervical and thoracic strain. She testified that a 264 pound patient rolled onto her arm. At that time, she initially felt pain in her arm and neck, and later felt numbness. during the fifteen-month period after the July 1996 accident, claimant was in a great deal of pain and required the assistance of other employees to help her with her duties. Claimant also limited her activities outside of work due to episodes of pain. Claimant admitted that she did not seek further medical attention between July 1996 and October 1997 for her neck or shoulder problem. A finding of causation is supported by the medical record. Dr. Bradner . . . confirmed that the treatment beginning October 27, 1997, was related to the July 1996 work accident. Dr. Ayres . . . recorded an accurate history of the . . . accident and [claimant's] ensuing symptoms. . . . Although he made no specific statement regarding causation, his diagnosis of the chronic strains juxtaposed to the accurate history certainly implies a causal relationship. Dr. Kiluk . . . provided an Attending Physician's Report which specifically supported the causal relationship. The commission did so and accepted the opinions of Drs. Bradner, Ayres, and Kiluk, while rejecting the contrary opinion of Dr. Thompson, who never examined or treated claimant. The medical records and opinions of Drs. Bradner, Ayres, and Kiluk, along with the testimony of claimant and her co-worker, constitute credible evidence supporting the commission's decision. "[T]he commission was free to credit claimant's testimony at the hearing as a basis for its finding of causation. The fact that contrary evidence may appear in the record 'is of no consequence if there is credible evidence to support the commission's finding.'" Dollar General Store v. Cridlin, 22 Va. App. 171, 177, 468 S.E.2d 152, 155 (1996) (quoting Wagner Enters., Inc. v. Brooks, 12 Va. App. 890, 894, 407 S.E.2d 32, 35 (1991)). Heritage Hall Blackstone v. Henley, Record No. 0036-99-2 (October 19, 1999). WP Version.

Claimant’s condition, though in part due to congenital abnormality of the craniocervical junction, was the direct result of a fall at work.  The claimant’s doctor stated that the surgery performed to correct the abnormality was the direct result of this fall.  The surgery would not have been performed had she not fallen. As the treating neurosurgeon, the doctor’s opinions were entitled to be given great weight by the commission.  See Pilot Freight Carriers, Inc. v. Reeves, 1 Va. App. 435, 439, 339 S.E.2d 570, 572 (1986).

The commission is also free to consider the testimony of a claimant in determining causation, especially where the medical testimony is inconclusive." Dollar General Store v. Cridlin, 22 Va. App. 171, 176, 468 S.E.2d 152,154 (1996).

Claimant's doctor recorded a history that claimant's pain after the accident was of abrupt onset, that it affected claimant's lumbar spine, and that it had a radicular quality. Claimant testified that although he had suffered from previous back pain, the pain he felt after the  accident was much more intense than anything he had ever experienced before. A neurosurgeon, diagnosed a disc herniation at the L3-4 level. Claimant testified that although some of his pain abated after the surgery, he still suffers from back symptoms and has not fully recovered. Claimant's testimony and the medical records provide credible evidence to support the commission's finding that the medical treatment received by claimant after the accident was causally related to that accident. Harman Ceiling and Partitioning Co. v. Lusk, Record No. 0612-99-3 (July 20,1999). WP Version.

No doctor stated that the claimant's non-ischemic central retinal vein occlusion in his left eye was caused by exposure to welding flashes, or was the result of corneal abrasions sustained at the time of the flashes. The closest any doctor comes on this record to such a statement is the statement of a doctor that claimant's retinal condition "appeared to develop in association with [claimant’s] ocular injury." In the immediately preceding sentence, the doctor’s report stated that central retinal vein occlusion is often of unknown cause.  At most, the doctor was stating no more than a temporal association between the claimant's corneal abrasions and the development of the central retinal vein occlusion. At most, there is an undefined temporal association between the two conditions. Such a conclusion is not sufficient to find the necessary causal relationship between the claimant's corneal abrasions and his retinal condition. Lynn J. Dempsey v. Enerfab Corporation, Record No. 1894-98-2 (February 2, 1999).

The illegality defense is based on the principle that a party who consents to and participates in an illegal act may not recover from other participants for the consequences of that act. Miller v. Bennett, 190 Va. 162, 164-65, 56 S.E.2d 217, 218 (1949). In Miller v. Bennett, 190 Va. 162, 56 S.E.2d 217(1949), the court held that the estate of a woman, who died after participating in an illegal abortion, could not recover damages for wrongful death from the person who performed the abortion procedure. This holding was based on the fact that the direct cause of the decedent's death was the illegal conduct in which she consensually participated. The illegality defense will be applied to bar recovery if the evidence shows that the plaintiff freely and voluntarily consented to participation in the illegal act, without duress or coercion. Trotter v. Okawa, 248 Va. 212, 216, 445 S.E.2d 121, 123-24 (1994). As with other defenses, the party raising the illegality defense has the burden to establish it. A determination of whether a person has engaged in an illegal act, for purposes of the illegality defense, is an objective inquiry. See Zysk v. Zysk, 239 Va. 32, 35, 404 S.E.2d 721, 722 (1990). In Zysk v. Zysk, 239 Va. 32, 404 S.E.2d 721 (1990), the court held that a woman who had contracted a sexually transmitted disease during premarital sex could not recover damages from her partner. The act of sexual intercourse was both consensual and illegal. The court explained that "courts will not assist the participant in an illegal act who seeks to profit from the act's commission." Id. at 34, 404 S.E.2d at 722. See also, Eagle, Star and British Dominions Ins. Co. v. Heller, 149 Va. 82, 140 S.E. 314 (1927), in which the court held that a convicted arsonist could not recover under an insurance policy for damages to a building that he had burned. Id. at 105-06, 140 S.E. at 321. See Benjie Godbolt v. Robert W. Brawley, Et al., Record No. 950105 (November 3, 1995).

Concurrent disability. During the period in dispute, claimant had not been released to return to her pre-injury employment. Although claimant's surgery produced a concurrent disability, the evidence established that she had not fully recovered from her compensable injury. The dates of claimant's recovery period for the intervening injury were June 8, 1994 to July 15, 1994, a period prior to Dr. Dunstan's release of claimant to her pre-injury employment on August 4, 1994. Thus, the commission did not err in holding employer responsible for compensation during the disputed period. Lynchburg General Hospital v. Antonia Spinazzolo, Record No. 0343-95-3  (March 26, 1996).

Employer bore the burden of proving, on its change-in-condition application, that claimant's ongoing pain and related disability are not causally related to her compensable injury. Employer failed to meet its burden. Claimant had a diagnosis of fibromyalgia prior to her compensable injury, and claimant's treating physician opined that her pre-existing fibromyalgia played a greater role in her inability to return to full-duty employment than did her mechanical back problem. However, a rheumatologist believed that claimant's mechanical back problem was responsible for her pain and that "the back problem is fanning the fibromyalgia." On October 9, 1997, the treating physician reported that "it's not really clear what the source of [claimant's chronic pain problem] is; that is, it could be related to her chronic myofascial pain; it may be related to scar tissue in her back or just a chronic muscular problem." On November 6, 1997, however, less than a month later, and without further examining claimant, and without articulating any basis for a different opinion, the treating physician opined that claimant's pain was not related to her accident of September 7, 1994, but that her chronic pain problem stemmed from the pre-existing fibromyalgia. Although the opinion of the treating physician is entitled to great weight, see Pilot Freight Carriers v. Reeves, 1 Va. App. 435, 439, 339 S.E.2d 570, 572 (1986), "[m]edical evidence is not necessarily conclusive, but is subject to the commission's consideration and weighing." Hungerford Mechanical Corp. v. Hobson, 11 Va. App. 675, 677, 401 S.E.2d 213, 214 (1991). Given the absence of any further examination of the claimant or an additional report supporting the treating physician's change of opinion, the commission was free to reject the treating physician's opinion as to causation. Once the commission rejected this opinion, no evidence in the record proved that claimant's ongoing disability was not causally related to her compensable injury. Additionally, a neurologist was unable to conclude that claimant's ongoing pain was caused solely by her pre-existing fibromyalgia. The neurologist's testing resulted in objective findings which implicated sources for claimant's ongoing pain other than, or in addition to, claimant's fibromyalgia. Mary Washington Hospital v. Patricia B. Holloway, Record No. 1582-98-2 (March 30, 1999). WP Version.

The exacerbation of a pre-existing injury constitutes a new compensable accident where it arises out of and in the course of employment. See Ohio Valley Constr. Co. v. Jackson, 230 Va. 56, 58, 334 S.E.2d 554, 555 (1985) (a new injury which exacerbates a previous condition resulting in accelerated disability is compensable). Where an employee's accident causes increased injury and disability, even though to the same anatomic area of a previous condition which continued to be symptomatic, the second accident establishes an independent injury under the Workers' Compensation Act where it arises out of and in the course of the employment. See Pelerin v. Hematology and Oncology Assocs., Ltd., 67 O.I.C. 212 (1988). A. D. Stowe v. Otis Wayne Ricks, Record No. 2704-98-1 (April 27, 1999). WP Version.

The commission was unwilling to infer causation under the facts of this case. Liddell admitted that she suffered from significant pre-existing shoulder problems. On September 30, 1996, Dr. [Robert] Stinger indicated that [Liddell's] work injury had resolved. [Liddell's] rotator cuff tears were not diagnosed until March 1997. At that time, Liddell was diagnosed with a rotator cuff tear of the right shoulder as well as the left shoulder, even though there is no evidence that the right shoulder was injured at the time of her industrial accident. Under these facts, we can only speculate whether the claimant's left rotator cuff tear was caused by the work accident . . . . The commission's findings are amply supported by the record. Based upon the lack of any persuasive medical evidence to connect Liddell's left shoulder rotator cuff tear with her compensable work injury, we cannot say as a matter of law that her evidence sustained her burden of proving causation. Ruth Liddell v. INOVA Fairfax Hospital, Record No. 2746-98-4 (May 18, 1999). WP Version.

 "A finding that a pre-existing condition was accelerated or aggravated by an injury sustained in an industrial accident establishes a causal connection between the injury and the disability and the disability resulting therefrom is compensable under the Workers' Compensation Act."  Corning, Inc. v. Testerman, 25 Va. App. 332, 340, 488 S.E.2d 642, 645 (1997) (citations and internal quotations omitted). Basic Construction Company v. Hamilton, Record No. 2844-98-1 (August 17, 1999). WP Version.   

On April 29, 1996, claimant strained his back while working in a manhole. He felt a "bad pop" in his back and a "shock" from the "top of [his] head to the bottom of [his] feet." claimant had a history of spondylolisthesis and prior back injuries. an MRI exam on May 3, 1996, revealed Grade I spondylolisthesis at L5-S1, minimal disc protrusion at L3-4 and L4-5 with degenerative disc disease, and "findings suspicious for herniated nucleus pulposus." Another MRI several weeks later revealed a bulging disk at C4-5 and C5-6 and a herniation at C6-C7. On October 9, 1996, claimant’s treating physician performed a lumbar fusion at L4-5 and L5-S1. Claimant’s neck and arm complaints continued and claimant’s doctor believed the back injury and neck injury and treatment was causally related to the work-related incident on April 29, 1996. Claimant underwent anterior cervical diskectomy on February 26, 1997. Although another doctor disagreed with the treating physician’s opinions on causation, credible evidence in the record established a causal connection between the accident on April 29, 1996 and claimant's continued back disability and treatment and his neck injury and treatment. "`So long as a causal relationship between the industrial accident and the . . . [treatment rendered] is shown, the employer is financially responsible for the medical attention which the attending physician deems necessary.'" Papco Oil Co. v. Farr, 26 Va. App. 66, 74, 492 S.E.2d 858, 861 (1997) (quoting Lynchburg Foundry Co. v. Goad, 15 Va. App. 710,714, 427 S.E.2d 215, 217-18 (1993)). Claimant was treated conservatively at first before surgery for his injuries caused by his accident was attempted. Claimant's treatment was necessary and reasonable. "Whether an employer is responsible for medical expenses . . . depends upon . . . (3) whether the treating physician made a referral to the patient." Volvo White Truck Corp. v. Hedge, 1 Va. App. 195, 199, 336 S.E.2d 903, 906 (1985). When claimant’s treating physician decided to relocate his practice, he recommended Dr. Joiner for further treatment but claimant requested a referral to Dr. Knox and Dr. Mathews. The treating physician, in attempting to accommodate the wishes of a rehabilitation nurse and claimant, created a situation where the nurse believed the referral was to Dr. Joiner and claimant believed the referral was to Drs. Knox and Mathews. Drs. Knox and Mathews became claimant's authorized treating physicians. City of Martinsville v. Timothy Scott Turner, Record No. 2753-98-2 (July 27, 1999). WP Version.  

Sec. 65.2-402(C) presumption requires proof of cause. After 30 years with the fire department, Claimant was diagnosed with prostate cancer, an ordinary disease of life of unknown etiology.  Claimant's evidence, however, documented an exposure to cadmium, a substance identified as carcinogenic by the International Agency for Research on Cancer (IARC), as a suspected cause of prostate cancer. Code Sec. 65.2-402(C), provides, in pertinent part, that “prostate cancer, caused by a documented contact with a toxic substance that a . . . fire fighter . . . has encountered in the line of duty and that causes . . . any health condition or impairment[,] . . . shall be presumed to be an occupational disease, suffered in the line of duty, that is covered by this title, unless such presumption is overcome by a preponderance of competent evidence to the contrary.  For the purposes of this section, a ‘toxic substance’ is one which is a known or suspected carcinogen, as defined by the International Agency for Research on Cancer [IARC], and which causes, or is suspected to cause, . . . prostate . . . cancer.” Code Sec. 65.2-402 (C) explicitly provides that the presumption of occupational disease applies to prostate cancer "that is caused by a documented contact with a toxic substance." Claimant was not entitled to the statutory presumption of occupational disease because he did not prove that exposure to the toxic substance cadmium "caused or contributed to cause, his prostate cancer." Newell E. Whitehead, Jr. v. City of Portsmouth FD, Record No. 2975-98-1 (July 27, 1999). WP Version.

Need for Medical Opinion on Causation Issue. The Workers' Compensation Commission ("commission") did not err in finding that the claimant failed to prove that (1) his varicose veins were caused by a physical therapy session on September 19, 1997 necessitated by his compensable August 5, 1997 left knee injury; and (2) his post-September 25, 1997 disability was causally related to his compensable August 5, 1997 injury by accident. There was no opinion from any physician causally relating the claimant's varicose veins or claimed disability to his accident or his physical therapy for his left knee injury sustained in that accident. For the Commission to infer such a causal relationship would be mere speculation without any expert guidance from the physicians who have examined the claimant. Vagharshak A. Vartanian v. Advantage Auto Stores, Record No. 2048-98-4 (September 28,1999). WP Version. 

The commission did not err in finding that claimant's generalized dystonia is causally related to her industrial accident of October 23, 1990. Claimant, a preschool teacher, fell as she was entering her vehicle, which was parked in the driveway of a student she was visiting in the course of her employment. Claimant  received six stitches on her head. In addition to the laceration on her head, claimant suffered a sore and stiff back and neck. Claimant's back pain did not abate over the years and she developed spastic, uncoordinated patterns of movement ultimately diagnosed as dystonia. Although claimant's earlier physicians had not accurately diagnosed claimant's condition, the commission was persuaded by Dr. Grill's observation that a person suffering from a movement disorder may go undiagnosed for years, unless detected by a physician experienced in the field. The commission resolved the various conflicts in the evidence and found credible evidence establishing a causal relationship between the claimant's work-related trauma and the dystonic symptoms she experienced.  Fairfax County School Board v. Sally Ann Presti, Record No. 3010-98-4 (October 19, 1999). WP Version.

Claimant fell, attempted to break her fall with her right hand, and hit her chin on the sidewalk. She suffered abrasions to her right hand and chin. Subsequent medical treatment revealed that claimant was suffering from an abscess in the psoas muscle. Initially, her treating physician found no obvious cause of the abscess, but later, an unnamed consultant on infectious diseases suggested as follows: "Staph aureus most likely developed [as a result of] seeding from a transient bacteremia [at] hand scrape upon fall 4/3," resulting in a psoas abscess. The treating physician then stated that the infectious disease consultant had opined that claimant's staph infection was likely derived from the abrasions she sustained in the April 3, 1998 fall. The treating physician further stated that he did not have "any other explanation for why [claimant] developed a staph abscess in her psoas." The treating physician concluded that "attributing the staph abscess to a bacteremia from such a scrape would be certainly possible. I would support that hypothesis given no other information." An Associate Professor in the Division of Infectious Diseases at Virginia Commonwealth University, reviewed claimant's entire medical file at the request of employer. The Assistant Professor opined to a reasonable degree of medical certainty that claimant's right psoas abscess was not causally related to the April 3, 1998 work-related fall, setting forth a detailed explanation for her opinion. The commission did not err in finding the claimant had failed to meet her burden of proving the abscess was caused by her compensable accident. The claimant has, at most, presented evidence that suggests two or more equally likely causes of the claimant's psoas abscess. The opinion of the claimant's treating physician is entitled to less deference for lack of an independent, objective basis for his diagnosis, we accord the conflicting, expert testimony of the employer's independent medical examiner at least as much weight as that of the treating physician. None of the other physicians involved offered an opinion that any particular cause "more likely than not" caused the claimant's psoas abscess. Doris Patricia Cote v. Western State Hospital, Record No. 1390-99-3 (October 26, 1999). WP Version.

Claimant's treating neurosurgeon, who began treating claimant in July 1997 and twice performed surgery on claimant's back, opined that it was "more likely than not" that claimant's L4-5 disc herniation was caused either directly by the June 23, 1997 injury by accident or constituted "a natural progression or deterioration" of the condition caused by that injury by accident.  Another neurosurgeon, who examined claimant and reviewed his diagnostic studies upon referral from the treating neurosurgeon, opined that claimant's need for surgery to repair his L4-5 disc defect was related to the June 23, 1997 injury. An employer’s expert only examined claimant three times.  Another doctor did not examine claimant at all and merely reviewed his medical records. Based upon these medical opinions and the medical records, the commission did not err in concluding that claimant proved a causal relationship between the L4-5 disc herniation and his compensable June 23, 1997 injury by accident.  Where medical evidence conflicts and the treating physician is positive in his or her diagnosis, then his or her opinion will generally be afforded greater weight by the courts. See Pilot Freight Carriers, Inc. v. Reeves, 1 Va. App. 435, 439, 339 S.E.2d 570, 572 (1986). Although claimant, just before his October 1997 myelogram CT, felt a sharp pain when he rolled from his back to his left side while on his couch at home, the medical records, which documented claimant's  ongoing and continuous back pain before October 1997, and the opinions of the treating neurosurgeon and the doctor to whom claimant was referred by the treating neurosurgeon  constitute credible evidence to support the commission's finding that the sharp pain claimant felt in October 1997 was merely a part of the ongoing symptoms he had experienced since the June 23, 1997 accident and did not constitute a new injury. New River Castings Company v. James Maple, Record No. 1552-99-3 (November 16, 1999). WP Version.

Employer’s counsel was guilty of the late filing of a medical report. The deputy commissioner admitted the doctor’s report into evidence but provided claimant with ample opportunity to cross-examine the doctor before the record closed.  Claimant elected not to cross-examine the doctor in any manner whatsoever.  Having chosen not to take advantage of the opportunity to cross-examine the doctor regarding the medical report, claimant cannot claim that she was prejudiced by the late filing. The commission did not abuse its discretion in admitting into evidence the medical report that had been filed late. The commission also did not err in denying claimant disability benefits after March 31, 1996 and in denying medical benefits for treatment incurred after April 25, 1996.  In doing so, the commission relied upon the opinions and medical records of two doctors and rejected the opinions of two other doctors. The medical records and opinions of the two doctors relied upon support the commission’s findings that claimant was not disabled after March 31, 1996 due to the effects of her exposure to Lysol Brand Concentrate at work in February 1996; that the effects of that exposure ended by April 25, 1996; and that her symptoms thereafter were due to pre-existing conditions or other causes. The commission articulated sound reasons for giving little probative weight to the contrary opinions of the two other doctors. “Medical evidence is not necessarily conclusive and is subject to the commission’s consideration and weighing.” Hungerford Mechanical Corp. v. Hobson, 11 Va. App. 675, 677, 401 S.E.2d 213, 215 (1991).  “Moreover, “[q]uestions raised by conflicting medical opinions must be decided by the commission.” Penley v. Island Creek Coal Co., 8 Va. App. 310, 318, 381 S.E.2d 231, 236 (1989). Joleane Dutzman v. J. Douglas Wooddell, DDS, Record No. 1735-99-4 (November 16, 1999). WP Version.

Based upon the lengthy delay between the time of claimant's compensable accident and the first documentation of her neurological complaints, the Workers' Compensation Commission did not err in finding that claimant failed to prove that her medical treatment after July 17, 1996 and her disability beginning February 20, 1998 were causally related to her compensable July 15, 1996 injury by accident. Although claimant testified that she continuously complained for a year and a half about her headaches, dizziness, and nausea to her doctor who saw her frequently, the extensive medical record reflects otherwise. Claimant's  neurologic complaints did not begin until at least nineteen months after her July 1996 accident. Shirley P. Keesee v. Wise County School Board, Record No. 2273-99-3 (February 8, 2000). WP Version.

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