Desmoplastic Malignant Melanoma

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Abstract
Desmoplastic malignant melanoma is an unusual variant of cutaneous melanoma. Arising from either an occult or recognized superficial melanotic lesion, it evolves into an aggressive, locally recurrent and frequently metastasizing, deep, hard, fibrous tumefaction. A highly confusing clinical and histologic picture makes accurate diagnosis especially difficult. Appropriate treatment is often delayed until time of recurrence. Prognosis is invariably poor if the tumor is not adequately treated primarily. Close follow-up is essential. Since its original description by Conley et al. in 1971, in which 7 cases were presented, fewer than 150 additional cases have been cited. We provide a detailed report of 11 cases of this distinct histopathologic entity. Clinical course, histopathology, surgical management, and prognosis are discussed. It is our hope that this comprehensive review will instill a high index of suspicion among surgeon and pathologist alike, enabling earlier diagnosis and definitive therapy.

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