Benign cephalic histiocytosis

A rare non-Langerhans cell histiocytosis characterized by multiple small yellowish-red or brown papules initially erupting predominantly in the head and neck region. The histopathological hallmark of these eventually self-healing lesions is a dermal proliferation of histiocytes with intracytoplasmic comma-shaped bodies, coated vesicles, and desmosome-like structures. Birbeck granules are absent. The disease typically occurs in young children.