Giant Cell Tumor of Tendon Sheath: A Common Benign Entity With a Sore Note

Giant cell tumor of the tendon sheath (GCTTS) is a slow-growing benign lesion that is reported to be the second most common soft tissue tumor of the hand. Etiopathogenesis remains unexplained, and pre-operative diagnosis is lacking in the majority of cases. A high recurrence rate remains a challenge for the surgeons, with incomplete excision being the most consensually accepted reason. A standard operative protocol of using a magnifying loupe/operating microscope for surgery helps in meticulous dissection and thus reduces the incidence of recurrence in GCTTS. We present the case of a 30-year-old female with a slowly growing nodular lesion on her right index finger, reported as GCTTS post-operatively; however, there was no recurrence at 18 months follow-up because of the use of a magnifying loupe during surgery.