[Clinical Rounds] Generalised eruptive histiocytosis mimicking lymphoma relapse in a patient with previous diffuse large B-cell lymphoma

A 92-year-old man with a history of diffuse large B-cell lymphoma treated with chemoradiotherapy, and later with radiotherapy for an isolated cutaneous relapse with complete response, presented with a 1-month history of multiple asymptomatic erythematous-to-violaceous papules and nodules on the face, trunk, and upper limbs. Given his oncological history and previous skin involvement, lymphoma relapse was the leading diagnostic concern, with cutaneous metastases and sarcoidosis also considered. H