Claimant saw her primary care physician, Dr. Adams, in February 2013 for problems with her right thumb. The symptoms involved her hands locking up, dropping things, numbness, tingling, and being awoken at night. Dr. Adam's records noted patient presents with "right hand
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[^0]: ${ }^{1}$ Claimant raised objections to the admission of Dr. Goldfarb's records to the extent he addresses causation, although no argument in favor was including in the post trial brief. Those objections are overruled. Claimant testified Dr. Goldfarb made comments to her regarding causation, making what he actually wrote on the topic relevant and admissible. When a party opens the door to a topic, the admission of rebuttal evidence on that topic becomes permissible. Howard v. City of Kansas City, 332 S.W.3d 772, 785 (Mo. 2011).
${ }^{2}$ When Claimant was initially hired she worked the 11:00 to 7:30 shift for a year.
pain" with a history of "about 1 week of pain at base of $\mathrm{L}^{3}$ thumb." The exam showed tender base of left thumb, and the diagnosis was joint pain, likely DJD.
On April 23, 2013, Claimant saw Dr. Strecker, who noted Claimant had been having pain and stiffness in her left thumb which has progressed to the right thumb and is worse in the morning. She complained it will catch on her. The diagnosis was stenosing tenosynovitis. He started treatment with medication and a splint, but Claimant never returned for follow up.
Claimant then told Christina, her supervisor, about her hand problems. Employer sent Claimant to BarnesCare ${ }^{4}$ on August 28, 2013. She complained her hands were swollen, locking and painful and she started noticing pain and locking of thumb about 6 weeks prior. Symptoms were worse on the right and woke her at night. The exam was significant for positive Phalen's and tenderness to palpation at base of thumbs. The diagnosis was acquired trigger finger/thumb bilaterally, and unspecified neuralgia. BarnesCare referred Claimant for testing to rule out CTS.
On October 16, 2013, Claimant came under the care of Dr. R. Evan Crandall. His evaluation included review of the job analysis report, Claimant's work history, symptoms, medical history, description of her job, a generalized description of her lifting, typing, mouse, hand-writing and posture had been performed. Claimant reported she would take up to 100 calls per day and talk to customers about bills, payments and problems when their lights would go out. She did not know how many key strokes or pages she typed in a day, but she felt work caused her symptoms.
The nerve conduction studies performed by Dr. Phillips were positive for mild right CTS, very mild left CTS, and mild right ulnar neuropathy. Specifically the nerve testing showed " $[t]$ here is evidence for very mild demyelinative median sensory neuropathy across the left carpal tunnel. There is mild demyelinative ulnar motor dueropathy across the right elbow with sensory axonal involvement and this makes the lesion more significant." Dr. Crandall recommended conservative treatment, noting he did not recommend surgery for patients with minor values on their nerve conduction studies. He recommended a cortisone injection for the right trigger thumb, or a trigger thumb release if the symptoms did not resolve.
Based upon the history provided, he did not believe Claimant's work was the prevailing factor in the cause of her conditions of ulnar neuropathy, carpal tunnel syndrome ("CTS"), and trigger thumb. He has analyzed jobs of customer service representatives in the past, and did not believe those jobs were hand-intensive. He noted keyboarding has no association with cubital tunnel syndrome, and although high-level keyboard work could cause CTS, it has to exceed the OSHA guidelines of 4 hours of continuous typing per day. According to Dr. Crandall, customer service representatives never have continuous typing. He noted to meet the NIOSH guidelines, one would have to exceed 15,000 keystrokes per hour, and he did not believe Claimant would have that volume of typing activity.
Dr. Crandall noted Claimant had medical risk factors for her CTS, ulnar neuropathy, and trigger thumb, which included her age, gender, high body mass index, high blood pressure and surgical menopause. Based on Dr. Crandall's opinion, Employer declined to authorize treatment. Claimant was not happy with that decision and told Employer she would go to her own doctor.
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[^0]: ${ }^{3}$ The record contains these apparently contradictory references to the right and left extremities.
${ }^{4}$ Claimant testified she was treated at Concentra, but the records are from BarnesCare.
On November 7, 2013, Claimant came under the care of a physician of her own choice, Dr. Goldfarb. He recorded complaints of right hand swelling, mild numbness and tingling, and thumb pain right worse than left. Claimant's symptoms were present for several months, and in her opinion are related to typing and using a mouse all day. The exam was significant for negative Tinel's, positive Phalen's. His Impression/Diagnosis was trigger thumb, primarily right side with mild CTS, and the plan was to proceed with right trigger thumb release only.
Dr. Goldfarb discussed the relationship of work to her diagnoses, and although "excessively high keystrokes" can be related to the development of CTS, he did not believe work is the prevailing factor for the development of Claimant's CTS or trigger thumb. On causation, Dr. Goldfarb opined. "I do not believe work is the prevailing factor for the development of her carpal tunnel syndrome. Trigger digits and trigger thumb have been less studied in the literature but given the state laws of Missouri, I cannot relate it either as the prevailing factor." Dr. Goldfarb performed right trigger thumb release procedure on December 11, 2013 .
Claimant recovered well from her thumb surgery and returned to work in January 2014, although she soon thereafter missed time while she successfully battled breast cancer. During this time, Employer performed ergonomic adjustments to her work station, and she now has fewer problems.
Claimant has high blood pressure and had a hysterectomy in 2009. She has no autoimmune disease or thyroid problems, but is on several medications for high blood pressure and for her status as a cancer survivor. Claimant is 5'5", right handed and has weighed in the range of 180-190 pounds at all relevant times. Claimant testified she still wears braces at night and takes Ibuprofen and Flexeril as needed. She wakes from pain 2-3 times a week. She currently does not want surgery. Claimant uses her stylus to text on her cell phone. She just recently got a home computer and does not keyboard outside of work. Claimant does not pick up her grandkids for fear of dropping them and has trouble opening jars. Her right hand is worse than the left and she has swelling 2-3 times a week.