Clinicopathological and Histogenic Study of Alreolar Soft Part Sarcoma

Thirty-one cases of alveolar soft part sarcoma (ASPS) were presented. The tumor affected mostly young, lower extremeties. The 5-year-survival-rate was 54.5%, Twenty-eight cases of ASPS were studied with 11 of immunohistochemical antiserum. Myoglobin-positive tumor cells were found in 23 cases (82.1%), desminpositive in 18 cases (64.3%) and S-100 proteinpositive tumor cells in 3 cases (10.7%) 3 the others were all negative. Electron Microscopically, the special rhombus crystalls were found in the cytoplasm of tumor cells of 2 cases.It is likely that ASPS has some relationship to the usual types of muscle cell tumors.