Synovial Sarcoma
Classification / Lists
Keratin positive soft tissue tumors (frequent and strong)
- Desmoplastic small cell tumor
- Epithelioid angiosarcoma
- Epithelioid sarcoma
- Extrarenal rhabdoid tumor
- Glandular schwannoma
- Malignant peripheral nerve sheath tumor (occasional)
- Metastatic carcinoma
- Parachordoma
- Proximal type epithelioid sarcoma
- Synovial sarcoma
CD99 positive tumors (>50%)
- Hemangiopericytoma
- Meningioma
- (Normal thymus)
- Peripheral primitive neuroectodermal tumor
- Precursor T lymphoblastic leukemia / lymphoma
- Sex cord stromal tumors (various)
- Solitary fibrous tumor
- Synovial sarcoma
- Thymoma (lymphoid cells)
Lesions that may demonstrate a prominent hemangiopericytoma-like vascular pattern
- Cellular angiofibroma
- Deep fibrous histiocytoma
- Endometrial stromal sarcoma
- Glomangiopericytoma
- Glomus tumor
- Hemangiopericytoma
- Infantile fibrosarcoma
- Leiomyosarcoma
- Mesenchymal chondrosarcoma
- Myofibroma (infantile hemangiopericytoma)
- Myopericytoma
- Sinonasal hemangiopericytoma
- Solitary fibrous tumor
- Synovial sarcoma
