Microcystic adnexal carcinoma: a case report

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Author:
JIANG Yi-qun(Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing 210042, China)
WAN Chuan()
WU Jian-bing(Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing 210042, China)
SUN Jian-fang(Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing 210042, China)
Journal Title:
INTERNATIONAL JOURNAL OF DERMATOLOGY AND VENEREOLOGY
Issue:
Volume 37, Issue 03, 2011
DOI:
10.3760/cma.j.issn.1673-4173.2011.03.002
Key Word:
Carcinoma, skin appendage;Sweat gland neoplasms;Rare diseases

Abstract: A case of microcystic adnexal carcinoma is reported. The patient was a 43-year-old female, who had presented with a plaque on the left upper lip for more than 2 years. Skin examination revealed a demarcated, skin-colored plaque measuring 2.5 cm in diameter with telangiectasia on the surface of the left upper lip. Skin biopsy showed that the tumor lied in the dermis, infiltrating deeply into the underlying nervous and muscle tissue. There were many ductal structures and a small number of ramified glands with apocrine features in the upper dermis, strands of basophilic epithelial component imbedded in a markedly hyalinized stroma in the mid and lower dermis, as well as small and round keratinous cysts in the lower dermis. Immunohistoehemistry revealed strong positive staining of the epithelial components with cytokeratin. The staining for CEA and epithelial membrane antigen (EMA) was noted in the superficial ducts and glands. S-100 stain showed the infiltration of peripheral nerve with cytokeratin-positive epithelial components. A diagnosis of microcystic adnexal carcinoma was made. The patient underwent an excisional surgery and was followed up.

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