Case 2

A 45-year-old healthy man presents with a 6-month history of a red, scaly rash. The rash started on his lower back and has been spreading. He tried topical corticosteroids, which helped but did not clear the rash. He has some associated morning stiffness in his hands that improves with activity. His paternal uncle has a similar skin condition. On examination, well-demarcated erythematous plaques with silvery scale are noted on the patient’s lower back, elbows, knees, genitals, and scalp.

Can you diagnose the condition in Case 2?

A. Eczema
B. Mycosis fungoides
C. Psoriasis
D. Lichen planus

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