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Trabecular (Merkel cell) carcinoma arising in the wall of an epidermal cyst
R M Perse1, R S Klappenbach, B D Ragsdale
1Department of Pathology, Georgetown University School of Medicine, Washington, DC 20007.
The American Journal of Dermatopathology
|October 1, 1987
Abstract:
A trabecular (Merkel cell) carcinoma arising in the wall of an epidermal cyst in a 58-year-old white male metastasized, 17 months after local excision, to an inguinal lymph node. Ultrastructural studies showed polygonal tumor cells with typical dense-core granules. Although squamous-cell carcinoma and other malignant neoplasms have been reported rarely to have arisen in epidermal cysts, a literature search failed to find a precedent for the present case.