Cytodiagnosis of Multicentric Giant Cell Tumour of Tendon Sheath: A Rare Case Report

Giant Cell Tumour of Tendon Sheath (GCTTS) is a benign soft-tissue tumour that commonly arises from the tendon sheath complex and periarticular soft tissue of small joints. These tumours are usually localised and solitary, with multiple occurrences being rare. A multicentric origin is considered unusual and very few cases have been reported to date. Hereby, the authors present a case report of a 40-year-old female with a history of multiple swellings over the bilateral tendo-Achillis region, knees, left great toe and dorsum of the right middle finger since, 10 years ago. Biochemical parameters were normal and radiological investigations did not reveal any bony abnormalities. Fine needle aspiration from all sites revealed features consistent with GCTTS. Histopathology also showed findings typical of GCTTS. The present case highlights the unusual multicentric presentation of GCTTS.