<p>A 68-year-old man presented with asymptomatic progressive pigmentation, confined to the sun-exposed sites of his face and hands. Details of his drug history plus a skin biopsy with UV light microscopy revealed the diagnosis.</p> What’s the diagnosis?

<p>A 43-year-old man presented with pruritic, round, crusted lesions on his limbs. The size of the lesions varied, and there was a vesicular border.</p> What’s the diagnosis?

<p>A 32-year-old man presents with persistent and numerous reddish-brown spots on his limbs and trunk. The lesions are stable, but occasionally there is an urticarial reaction when they are rubbed. A skin biopsy confirmed the diagnosis.</p> What’s the diagnosis?

<p>A middle-aged woman presents with a recent history of tender annular and bow-shaped pustular lesions on her face, neck, and upper limbs.</p> What’s the diagnosis?

<p>A 38-year-old man presents with a smooth, shiny and well demarcated pearly nodule on his upper back. The nodule is asymptomatic and of unknown duration.</p> What’s the diagnosis?

<p>A 35-year-old woman presents with erythematous lesions on her upper limbs and trunk shortly after taking antibiotics for a urinary tract infection.</p> What’s the diagnosis?

<p>A 42-year-old woman presents with progressive yellow–brown pigmentation associated with nonpalpable purpura over her shins.</p> What’s the diagnosis?

<p>A 59-year-old woman with chronic renal failure presents with a recent history of multiple progressive, painful ulcers over the lower limbs.</p> What’s the diagnosis?

<p>A 47-year-old woman developed persistent itchy papules on the trunk and limbs over a two-year period.</p> What’s the diagnosis?

<p>A 34-year-old woman presents with an 18-month history of progressive hair loss, associated with tenderness, on her scalp. Tufted follicles and scarring alopecia were the key to diagnosis.</p> What’s the diagnosis?