Cytogenetic profile of uterine sarcomas

Cytogenetic characterization of sarcomas of bone and soft tissues

Specific chromosome rearrangements in different types of solid tumors have been described recently in a number of studies. However, the frequency and diagnostic importance of these chromosome rearrangements are currently under intensive investigation. The objective of this study is to provide a preliminary report on the types of clonal chromosome abnormalities observed in sarcomas of bone and soft tissues. Included in this report are osteosarcoma (five), synovial sarcoma (three), Ewing sarcoma (two), leiomyosarcoma (one), and spindle cell sarcoma (one). Cytogenetic analysis revealed clonal chromosome rearrangements in all of the tumors studied. Our findings correlated well with previously reported cytogenetic data on various types of solid tumors.

Endometrial stromal sarcoma with clonal chromosomal aberrations and mixed phenotype

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.