a 75 hers old man complaing of joints pain mainly knees, no | Figure 1

A 75-year-old man complaining of joint pain mainly knees, no other complaints. He has a history of hypertension under regular treatment since 10 years. I found this non-itchy lesion on his back. When I asked him about it, he said he has no idea. Four suggested diagnoses:

Suggested Diagnoses

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