Using immunohistochemistry, variable immunohistochemical reactions could be observed with reactivity for S-100 in 2 of 5 examined tumors, focal reactivity for desmin in 4 of 6 tumors, reactivity for actin in 1 of 7 tumors, and weak reactivity for NSE in 1 examined ASPS specimen. This evidence concerns the gene DES and alveolar soft part sarcoma.