Tenosynovial Giant Cell Tumor

**Semantic type:** Neoplastic Process

**Definition:** A tumor usually arising in the synovium of joints, bursa or tendon sheath. It is characterized by the presence of mononuclear cells, multinucleated osteoclast-like giant cells, hemosiderin-laden macrophages, foam cells, and an inflammatory infiltrate. According to the growth pattern, it is classified as localized or diffuse.

**Synonyms:** - Fibrous Histiocytoma of Tendon Sheath - Fibrous histiocytoma of tendon sheath - Giant Cell Neoplasm of Tendon Sheath - Giant Cell Neoplasm of Tenosynovium - Giant Cell Neoplasm of the Tenosynovium - Giant Cell Tumor of Tendon Sheath - Giant Cell Tumor of Tenosynovium - Giant Cell Tumor of the Tenosynovium - Giant cell tumor of tendon sheath - TGCT - Tendon Sheath Giant Cell Neoplasm - Tendon Sheath Giant Cell Tumor - Tenosynovial Giant Cell Neoplasm - Tenosynovial giant cell tumor