Case 1

A 30-year-old man presents to the office for a mildly itchy rash over a large area of his body that has been worsening for the past 6 months. He states that the rash started on his elbows and knees and has quickly spread to his torso and extremities. He has tried several home remedies to no avail. On examination, the patient has diffuse, erythematous plaques with silvery scale covering his elbows, knees, chest, and back. He has no significant medical history and is otherwise healthy. He is anxious to be rid of the rash.

Can you diagnose the condition in Case 1?

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A. Eczema
B. Tinea capitis
C. Tinea corporis
D. Psoriasis

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