Korean J Pathol.
2013 Jun;47(3):299-303.
Imprint Cytology of Soft Tissue Myoepithelioma: A Case Study
- Affiliations
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- 1Department of Pathology, Yeungnam University College of Medicine, Daegu, Korea. joonhyukchoi@ynu.ac.kr
- 2Department of Orthopedic Surgery, Yeungnam University College of Medicine, Daegu, Korea.
Abstract
- Soft tissue myoepithelioma is a rare neoplasm composed of myoepithelial cells. Here, we describe the cytologic features of soft tissue myoepithelioma arising on the right forearm in an 18-year-old man. The excised tumor (3.0x1.8x1.5 cm) was well-demarcated, yellow-gray, soft, and myxoid. The cytologic smears showed round to spindle, epithelioid, and plasmacytoid cells in the myxoid background. The nuclei were uniform, round to ovoid, with finely distributed chromatin and eosinophilic or pale cytoplasm. The tumor cells demonstrated immunoreactivity for cytokeratin (AE1/AE3), epithelial membrane antigen, S100 protein, and glial fibrillary acidic protein. Electron microscopy showed intermediate filaments, desmosomes, and basal lamina.
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