Rheumatoid arthritis and osteoarthritis Quiz: Ace Your Exams
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A 52-year-old woman comes to her primary care physician for evaluation of a painless mass that emerged on her right forearm several months ago. She has not had any recent trauma to the area. Past medical history is notable for rheumatoid arthritis and hypertension. Vitals are within normal limits. Physical examination of the hands reveals bilateral swelling and reduced range of motion in the metacarpophalangeal and proximal interphalangeal joints. Examination of the patient’s right forearm reveals the following finding:

Reproduced from: CDC Public Health Image Library
The nodule is firm and nontender to palpation. Cardiac, pulmonary, and abdominal examinations are noncontributory. Biopsy of the nodule is performed. Which of the following histological patterns will be most likely present?

Reproduced from: CDC Public Health Image Library
The nodule is firm and nontender to palpation. Cardiac, pulmonary, and abdominal examinations are noncontributory. Biopsy of the nodule is performed. Which of the following histological patterns will be most likely present?
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