A 35-year-old man presents with persistent, crusted papules concentrated over his central face, particularly around his eyes. What are these lesions?
A 35-year-old man gave a one-year history of numerous asymptomatic, persistent, crusted papules (1 to 3 mm diameter) that were concentrated over his central face. The papules were particularly localised to the periorbital region (Figure 1) but were also evident on his chin and his axillae. There was no history of facial flushing, and on examination there were no evident comedones. Skin biopsy showed sarcoidal granulomas with large central areas of caseation necrosis as well as perivascular lymphocytic inflammation (Figure 2).