NBME Step 2 CK Form 8 Degenerative joint disease (NBME Answers)

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Retired NBME Answer Explanations

Retired NBME Step 2 CK Form 8 Answers

step2ck_form8/Block 2/Question#22 (reveal difficulty score)
A previously healthy 62-year-old man comes to ...
Degenerative joint disease 🔍 / 📺 / 🌳 / 📖
tags: msk

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submitted by ∗step_prep(148)

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Elderly man with joint pain in his knees and DIP joints of the hand that are worsened by use, most consistent with osteoarthritis
Key idea: The two main diseases that affect the DIP joints of the hand (at least on NBME exams) are osteoarthritis and psoriatic arthritis

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weenathon Why isn't this rheumatoid arthritis? Doesn't osteoarthritis improve with movement and RA doesn't? Also isn't RA usually symmetrical like this guy and OA isn't? Also I know th heberden nodes are OA, but his pain was in the base of the thumbs, not the DIPs. Is it because there was no redness in the knees? I'm calling shenanigans on this Q. +

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