Archives of pathology & laboratory medicine
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Arch. Pathol. Lab. Med. · Apr 1981
Case ReportsSoft-tissue sarcoma of undetermined histogenesis: an ultrastructural study.
A certain proportion of soft-tissue sarcomas are difficult to classify accurately. In this case report, initial light microscope observations of a soft-tissue tumor suggested a diagnosis of a monophasic synovial sarcoma. However, critical evaluation of the histologic features, results of studies with special stains, and ultrastructural observations indicated that this tumor is best categorized as an undifferentiated soft-tissue sarcoma of "undetermined histogenesis."