Extraskeletal Ewing's sarcoma.

Clinicopathologic study of five cases of soft tissue tumors revealed distinct differences from skeletal Ewing's sarcoma in preferential localisation and mean age. The cases examined here are similar to cases described earlier as "extraskeletal Ewing's sarcomas". They show light- and electronmicroscopical features analogous to skeletal Ewing's sarcoma. The term extraskeletal Ewing's sarcoma appears to be appropriate for this type of soft tissue tumor.