In most cases, epithelial markers (CK, EMA, etc.), neuroendocrine markers (CgA, Syn, S-100, etc.), and specific melanocyte markers like HMB45 and melan-A are typically negative, whereas nonspecific markers such as NSE and vimentin are often positive in a significant proportion of ASPS cases. This evidence concerns the gene MUC1 and alveolar soft part sarcoma.