Neuroendocrine carcinoma of the skin (Merkel cell carcinoma) in a black.

Neuroendocrine carcinoma of the skin is an uncommon, small-cell neoplasm most commonly found on white, sun-exposed skin. Diagnosis by clinical and histologic means may be difficult. Immunohistochemical and ultrastructural analysis are often required. Because of the aggressive nature of neuroendocrine carcinoma of the skin, prompt diagnosis and treatment are essential. We present the rare occurrence of a neuroendocrine carcinoma of the skin on sun protected skin in a black. Clinical, histologic, immunohistochemical, and ultrastructural features are reviewed, and therapeutic options are discussed.