Giant cell tumor of the patellar tendon sheath in childhood: case report.

The aim of this study was to report a rare case of a giant cell tumor of the patellar tendon sheath. This indicates the diagnostic procedures and treatment options for giant cell tumors of the patellar tendon. This study reported a case of a 13-year-old male patient with a giant cell tumor of the tendon sheath. In our case, open arthrotomy was performed with complete surgical excision of the lesion. Histopathological examination revealed a giant cell tumor. At the last follow-up, 2 years after surgery, no complications were reported. The giant cell tumor of the patellar tendon sheath is an uncommon benign tumor. It mimics common knee symptoms. A differential diagnosis is definitely a challenge. Available operation approaches have demonstrated similar results, which lead to symptom relief and a low recurrence rate.