Atypical Tenosynovial Giant Cell Tumor of the Foot and Ankle: A Case Report.

Tenosynovial giant cell tumor, also known as giant cell tumor of the tendon sheath (GCT-TS), is a solitary, nodular, firm, benign, soft-tissue tumor that arises from the synovial lining of a tendon. The etiology is unknown. It is a rare soft-tissue tumor, with an overall incidence of one in 50,000 individuals, and usually affects people aged between 30 and 50 years. Magnetic resonance imaging tends to be the imaging modality of choice, used for surgical preparation. Widely accepted treatment involves local excision with or without radiotherapy. The author presents a case study involving a patient with an abnormally large, longstanding GCT-TS, diagnosed with clinical examination and imaging modalities, surgically excised, and further confirmed by pathology reports. Topic of discussion includes a review of GCT-TS.