[Current topics in the histological diagnosis of soft tissue sarcomas]

As a result of recent developments in soft tissue pathology, plus the contribution of electron microscopy and immunohistochemistry, pertinent revisions or modifications of the histological classification of soft tissue tumors published in 1969 by the World Health Organization have become necessary. Among the appreciable number of changes initiated during the last decade, the following conditions are considered remarkable and worthy of note for the histological diagnosis of human soft tissue sarcomas: dedifferentiated sarcomas, sarcomas of divergent differentiation, sarcomas with an epithelioid appearance, benign lesions mimicking a sarcoma, and newly categorized tumor entities.