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The Korean Journal of Cytopathology 2002;13(1): 42-46.
Epithelial-Myoepithelial Carcinoma of the Parotid Gland: Report of a Case Misinterpreted as Pleomorphic denoma on Fine Needle Aspiration Cytology.
Dong Chul Kim, Ahwon Lee, Kyo Young Lee, Cang Suk Kang, Sang In Shim
Department of Clinical Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea. klee@catholic.ac.kr
ABSTRACT
Epithelial-myoepithelial carcinoma(EMC) is a rare, low grade malignant tumor of the salivary glands. The EMC has a distinctive histological appearance comprising ductal structures with an inner epithelial cell component and an outer layer of myoepithelial cells which show plump clear cytoplasm. The cytologic features of the EMC have been rarely described. A correct cytological diagnosis to this rare tumor is difficult with high false negative rate. We report a case of EMC in which fine needle aspiration cytologic findings were misinterpreted as a pleomorphic adenoma.
Key Words: Epithelial-myoepithelial carcinoma; Pleomorphic adenoma; Parotid gland; Fine needle aspiration cytology