A Case Report on Cystic Giant Cell Tumour Over Dorsum of the 5th Metacarpophalangeal Joint Managed by Excision of the Tumour and Tendon Repair

Introduction: The giant cell tumour of the tendon sheath (GCTTS), also known as tenosynovial giant cell tumour, is the second most common soft tissue tumour of the hand. These tumours are typically benign, but their propensity to recur necessitates careful management. While GCTTS commonly presents in the flexor tendon of the fingers, occurrence in the extensor tendons is rare. Here, we discuss a unique case of GCT involving the extensor tendon of the 5th finger and its successful management through surgical excision. Case Presentation: an observational prospective analysis of a 19 -year -old female patient presented with complaints of swelling over the dorsum of the right hand managed by excisional biopsy of the swelling. The patient was followed up for 6 weeks postop. The diagnosis was confirmed by Histopathological examination. Conclusion: This case underscores the importance of considering GCTTS in the differential diagnosis of dorsal hand masses and highlights the efficacy of excisional biopsy in managing this condition. Early diagnosis and appropriate surgical intervention are key to preventing recurrence and ensuring good functional outcomes.