[Epithelioid sarcoma. A clinical, pathological and immunohistochemical analysis].

The author study the clinical history of a patient who initially had a nodule in the left arm and the lesion was excised, had 7 recurrences in the left arm in the following twelve years. The histological examination of one of the nodules showed that it was composed mainly of large ovoid and polygonal cells with abundant eosinophilic cytoplasm, vesicular nuclei and prominent nucleoli. There was an average of 4 mitoses in every 10 high power fields and rare atypical mitoses. The tumor cells showed intense activity with keratin, epithelial membrane antigen and vimentin, and were negative for the CD 31 endothelial marker.