A case of endocrine mucin-producing sweat gland carcinoma.
ABSTRACT Endocrine mucin-producing sweat gland carcinoma (EMPSGC), which is an uncommon sweat gland tumor with a predilection for the eyelids, is morphologically analogous to solid papillary carcinoma of the breast. We report the case of a 55-year-old man with a subcutaneous tumor of the upper cheek. The pathological findings for this patient were compatible with those of reported cases of EMPSGC, and p63 staining revealed partial microinvasion into the dermis. On the basis of these findings, the patient was diagnosed with EMPSGC. It is reported that EMPSGC is a precursor of invasive mucinous carcinoma of the skin. Therefore, this patient was treated and followed up as if he had mucinous carcinoma of the skin. To the best of our knowledge, this is the first report of such a case from Japan.
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ABSTRACT: Cutaneous endocrine mucin-producing sweat gland carcinoma (EMPSGC) is a very rare low-grade malignant neoplasm analogous to the mammary solid-papillary carcinoma. It frequently expresses neuroendocrine markers and may show mucinous differentiation. Although the nodules are circumscribed, myoepithelial cells cannot be demonstrated in most cases and about half of the cases are associated with invasive mucinous carcinoma. Hence, it has been suggested to be invasive and the precursor lesion of some primary cutaneous mucinous carcinomas. After being recognized as a distinct entity, all cases reported to date occurred either in the periocular region or on the cheek. Two thirds of the patients were female. Herein we present an unusual case of in situ EMPSGC on the chest wall skin of a middle-aged man.Journal of Cutaneous Pathology 02/2014; · 1.77 Impact Factor