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  • Title: Neuroendocrine (Merkel cell) carcinomas of the skin: an ultrastructural study of nine cases.
    Author: Silva E, Mackay B.
    Journal: Ultrastruct Pathol; 1981; 2(1):1-9. PubMed ID: 16830443.
    Abstract:
    Nine neuroendocrine tumors of the skin were examined by light and electron microscopy. The patients (7 males and 2 females) had an average age of 57 years. Seven tumors were located in the head and neck region. Light microscopic examination showed sheets of cells. In 4 cases, a tendency to form small groups of cells was observed. Contact with the epidermis was seen in only 2 cases. The dominant ultrastructural feature was the presence of cytoplasmic processes that contained membrane-bound granules 100-200 nm. Three tumors recurred locally, and in 7 patients, regional nodal metastases occurred. Three patients died of disseminated disease.
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