Arthroscopy is a viable treatment for a disturbing intracapsular tissue proliferation in a through-the-knee amputee, a case report.

This case report presents the successful arthroscopic resection of capsular hypertrophy in a 33-year-old female who underwent through-the-knee amputation following trauma. A minimally invasive surgical approach that has not yet been described in the literature for soft tissue hypertrophy at the amputation stump. The patient experienced persistent irritation and pain in the medial femoral condyle despite well-fit orthosis adjustments. Previous conservative treatments were unsuccessful. Given the patient’s complex history and risk of wound healing complications, an arthroscopic approach via the residual joint capsule was chosen to avoid open surgery. Postoperatively, the patient experienced rapid recovery, with symptoms resolving within months, and full prosthetic use was achieved at four months. This report highlights arthroscopy as a viable option for managing TKA stump complications. This provides other surgeons with a minimally invasive option for treating complaints on a joint stump with a residual joint capsule.