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Macules With Irregular Borders

Case 1 A 45-year-old man presents to your office because a mole on his arm has been changing over the past several months. He has no significant medical history but has been a patient of yours for the past 10 years after his mother was diagnosed with skin cancer. As a teenager, he frequently visited…

Nodules on the Arm and Leg

Case 1 A 67-year-old man presents with 2 nodules on his elbow. He has never had any skin conditions but 2 years previously was diagnosed with rheumatoid arthritis, which he manages with methotrexate and nonsteroidal anti-inflammatory drugs. The nodules are uncomfortable and aesthetically displeasing, but they are not painful. On examination, 2 large, firm, skin-colored…
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