EWSR1 and Ewing sarcoma: Translocations involving EWSR1 are found in numerous sarcomas, including Ewing sarcoma/PNET, low-grade fibromyxoid sarcoma, sclerosing epithelioid fibrosarcoma, mixed tumor/myoepithelioma, angiomatoid fibrous histiocytoma, clear cell sarcoma, desmoplastic small round cell tumor, extraskeletal myxoid chondrosarcoma, myxoid/round-cell liposarcoma, malignant peripheral nerve sheath tumor and intraosseous rhabdomyosarcoma.