DOI: https://doi.org/10.36347/sasjs.2026.v12i06.001

Pages: 534-537

Background: Tenosynovial giant cell tumors (TGCT) are benign proliferative lesions arising from the synovial lining of tendon sheaths, joints, and bursae. While they represent the most common softtissue tumors of the hand and fingers in adults, TGCT remain exceptionally rare in the pediatric population. Their etiopathogenesis is poorly understood, and the combination of a slow clinical course with low clinical suspicion frequently results in diagnostic delay in young patients. Case Presentation: We report the case of a 13-year-old boy presenting with a progressively enlarging, painful palmar swelling of the right middle finger, evolving over four years. Clinical examination, ultrasonography, and MRI were performed. Surgical excision was carried out under general anesthesia, and histological examination confirmed the diagnosis of tenosynovial giant cell tumor (WHO Grade 0). Conclusion: TGCT should be included in the differential diagnosis of any firm, long-standing digital mass, regardless of patient age. MRI is the imaging modality of choice, and complete surgical excision remains the standard treatment. Long-term follow-up is mandatory given the significant risk of local recurrence. This pediatric case highlights the diagnostic challenges and the importance of early surgical management to prevent functional impairment.