Merkel cell carcinoma (MCC) is the eponym for primary cutaneous neuroendocrine carcinoma, a dermal neoplasm with cytoplasmic, dense-core neuroendocrine granules and keratin filaments. MCC is an uncommon and aggressive cutaneous neoplasm. These tumors appear as rapidly growing, painless nodules in elderly white individuals or in young adults with ectodermal dysplasia syndromes. Most tumors measure 0.7-1.2 cm in diameter. MCC has a propensity to recur, and distant metastases indicate a condition that is nearly always fatal.
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Cite this: Elwyn C. Cabebe. Fast Five Quiz: How Much Do You Know About Merkel Cell Carcinoma? - Medscape - May 31, 2017.