title: Endometrial stromal sarcoma with clonal chromosomal aberrations and mixed phenotype.
abstract: We report a case of a moderate-grade endometrial stromal sarcoma with the following chromosomal complement based on the evaluation of 43 metaphases: 47,XX,der(3)t(3;6)(q29;p21.1),der(6) t(3;6)(q21;q27), + 19. Immunohistochemically, the paraffin-embedded tumor tissue displayed positive vimentin reactivity and lack of cytokeratin expression, indicating a mesenchymal origin. Interestingly, the cultivated tumor cells revealed a co-expression of vimentin and different subtypes of cytokeratin. Therefore, the cytogenetically monoclonal tumor cells which showed co-expression of epithelial and mesenchymal phenotypes suggest that the endometrial stromal sarcoma can be interpreted as a monophasic variant of the malignant mixed Müllerian tumor.
mesh_terms: D000368:Aged; D002869:Chromosome Aberrations; D016889:Endometrial Neoplasms / Q000737:chemistry / Q000235:genetics* / Q000473:pathology; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D012509:Sarcoma / Q000235:genetics* / Q000473:pathology; D014407:Tumor Cells, Cultured; D014746:Vimentin / Q000032:analysis
chemical_list: D014746:Vimentin