SMARCB1 and Epithelioid Malignant Peripheral Nerve Sheath Tumor: Among soft tissue tumors, SMARCB1 (also known as INI1, hSNF5) has been found altered in malignant extrarenal rhabdoid tumor (mutations), epithelioid sarcoma (deletions), epithelioid malignant peripheral nerve sheath tumor (loss of expression), myoepithelial carcinoma (loss of expression), and extraskeletal myxoid chondrosarcoma (loss of expression) [10,11].