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Epithelial differentiation in synovial sarcoma. Correlation with histology and immunophenotypic expression
1Department of Pathology, School of Medicine, University of Tokushima, Japan.
Acta Pathologica Japonica
|June 1, 1989
Summary
Synovial sarcoma cells exhibit epithelial characteristics, forming nests and clusters. Immunohistochemistry reveals specific cytokeratin profiles correlating with differentiation, aiding in diagnosis.
Area of Science:
- Oncology
- Pathology
- Cell Biology
Background:
- Synovial sarcoma is a rare soft tissue sarcoma with uncertain differentiation.
- Understanding the epithelial component is crucial for accurate diagnosis and prognosis.
Purpose of the Study:
- To investigate the epithelial properties of synovial sarcoma cells.
- To correlate these properties with histological grade and differentiation.
Main Methods:
- Histological examination of six synovial sarcoma cases (five biphasic, one monophasic).
- Immunohistochemical analysis for cytokeratins (low- and high-molecular-weight), vimentin, type IV collagen, and epithelial membrane antigen.
Main Results:
- Epithelial cells formed glandular nests, clusters, or scattered single cells.
- Epithelia showed reactivity for low- and high-molecular-weight cytokeratins, strongest in keratinized cells.
- Spindle cells were vimentin-positive; type IV collagen and epithelial membrane antigen showed variable distribution.
Conclusions:
- Synovial sarcoma displays distinct epithelial features and immunophenotypes.
- These findings correlate with histological differentiation, aiding in sarcoma classification.