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We thank Dr Schoenfeld for the interest in our article and the reference to an additional case of basal cell carcinoma overlying a histiocytoma.We agree with Dr Schoenfeld's contention that the occurrence of a nodular basal cell carcinoma over a dermatofibroma is extremely rare indeed. As we mentioned in our article, "the paucity of reports of nodular basal cell carcinomas overlying dermatofibromas probably reflects the rarity of their occurrence." No attempt was made in our study to establish the exact incidence of nodular basal cell or basal cell carcinoma-like changes overlying dermatofibromas from the approximately 15,000 cases of dermatofibromas in the Armed Forces Institute of Pathology collection.The purpose of our article was merely to point out the coexistence of dermatofibroma and nodular basal cell carcinoma in the same histological specimens, a phenomenon heretofore not clearly substantiated.
Goette DK. Basal Cell Carcinoma Overlying Dermatofibroma. Arch Dermatol. 1976;112(4):563-564. doi:10.1001/archderm.1976.01630280081046