Femuroacetabular Mixed Impingement with Anterolateral Chondrolabral Lesion and Periarticular Tenosynovial Giant Cell Tumor in the Right Psoas Compartment
—A Case Report

Tenosynovial giant cell tumor (TGCT) is a fibrohistiocytic, typically benign tumor deriving from the synovia and hemosiderin deposition. Any joint can be affected and symptoms are unspecific like joint pain, swelling and stiffness. There are different treatment methods, however the standard therapy is early surgical resection. We describe a case, where a 23-year-old patient suffered from a cam-emphasized mixed impingement with a labral tear, and therefore received a hip arthroscopy performing an extracapsular approach. Incidental findings in the MRI showed an unknown periarticular tumor in the right psoas compartment—later identified as TGCT, which was simultaneously resected arthroscopically in toto. Our case report shows, that even relatively big, extraarticular, benign lesions can be resected endoscopically, which offers a great minimal invasive alternative compared to open surgery to minimize postoperative immobilisation and pain.