The development of a clinically typical basal cell epithelioma in the epidermis overlying a long-standing preexisting histiocytoma cutis is described. The unusual site and the presence of a lobulated, hard intracutaneous nodule within the neoplasm was clinically suggestive of an unusual etiology. Attention is drawn to the epidermal changes which may be associated with histiocytoma cutis, and a brief review of the literature is given.
CARON GA, CLINK HM. Clinical Association of Basal Cell Epithelioma With Histiocytoma. Arch Dermatol. 1964;90(3):271–273. doi:10.1001/archderm.1964.01600030021004
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