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March 1968

Dermatofibroma of the External Auditory Canal

Author Affiliations

New Delhi, India

Arch Otolaryngol. 1968;87(3):246-248. doi:10.1001/archotol.1968.00760060248006

DERMATOFIBROMA is a benign fibrous tissue tumor seldom mentioned in otolaryngologic literature. Dermatologists have paid more attention to this condition than otolaryngologists. It is the purpose of this paper to review the clinical picture, pathology, cause, and treatment of dermatofibroma and to present a case history with its management.

Clinical Picture.—It occurs as a small (0.5 to 1 cm), round or spherical but occasional flat, slightly raised, well circumscribed, firm lesion. It is usually slightly reddish, but, because of the presence of lipids may be a yellowish-brown or bluish-black, reflecting the presence of hemosiderin. The solitary lesion, without symptoms, is commonly seen on an extremity.1

Pathology.—The histopathological picture (Fig 1) shows a fairly well-circumscribed lesion with varying numbers of cells, largely fibroblasts, with spindle shaped nuclei. The fibroblasts and the collagen are arranged in parallel intertwining and anastomosing bands.

The young lesions contain a predominance of endothelial