A hypopigmented and enlarging granulomatous eruption

Le résumé fourni par la source

A patient in his 40s was referred for a 2-year history of hypopigmented plaques. Prior biopsies demonstrated “granulomatous dermatitis.” Systemic evaluations revealed no evidence of sarcoidosis. Topical and intralesional corticosteroids, prednisone, and hydroxychloroquine were trialed without improvement. On referral, examination revealed an anesthetic hypopigmented plaque on the right upper extremity (Fig 1) and a pink plaque on the chest (Fig 2). A 4-mm punch biopsy of the chest revealed a perivascular infiltrate of lymphocytes with loosely formed aggregates of epithelioid histiocytes and a subepidermal grenz zone (Fig 3).

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