The Korean Journal of Cytopathology (대한세포병리학회지)

The Korean Society for Cytopathology (대한세포병리학회)
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Fine Needle Aspiration Cytology of Malignant Myoepithelioma of the Salivary Gland - A Case Report -

악성 근상피종의 세침흡인 세포학적 소견 -1 예 보고-

  • Lee, Jae-Hwa (Department of Pathology, Kosin University College of Medicine) ;
  • Park, Jean-Kyung (Department of Pathology, Kosin University College of Medicine) ;
  • Hur, Bang (Department of Pathology, Kosin University College of Medicine)
  • 이재화 (고신대학교 의학부 병리학교실) ;
  • 박진경 (고신대학교 의학부 병리학교실) ;
  • 허방 (고신대학교 의학부 병리학교실)
  • Published : 2002.06.30
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Abstract

Malignant myoepithelioma (myoepithelial carcinoma), is a very rare malignant epithelial accounting for less than 1% of all salivary gland tumors and has an intermediate malignant potential. We report a case of malignant myoepithelioma arising in the left parotid giand in a 54-year-old man, which was difficult to differentiate from pleomorphic adenoma and other malignant salivary gland neoplasms. Fine needle aspiration cytology of the parotid gland showed cellular smear, composed of overlapped sheets and clusters or individually scattered tumor cells without any acinic or ductal structures. The tumor cells were rather uniform, with distinct cell borders and moderate amount of cytoplasm. The eccentrically located nuclei were oval to round and pleomorphic and showed prominent nucleoli. A few clear cells were noted in the cellular aggregates Metachromatic matrix was seen between individual tumor cells in a lacelike fashion, resembling pleomorphic adenoma. According to the immunohistochemical staining, we recognized that the component cells are myoeplthelial in nature, showing reactivity for the S-100 protein, vimentin, and actin.

Keywords

References

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