Arthroscopic treatment of tumor-like lesions of the knee joint: Localized pigmented villonodular synovitis and ganglion cyst of the anterior cruciateligament

We present the arthroscopic treatment of a case of localized pigmented vill onodular synovitis that led to increasing restriction of knee flexion and t he case of a ganglion cyst within the anterior cruciate ligament causing un specific pain. Both pathologies could be resected arthroscopically with com plete relief of symptoms and no recurrence. Ln cases with unspecific clinic al signs and intra-articular masses shown on magnetic resonance imaging, ar throscopy is the next therapeutic step. Localized tumor-like lesions can of ten he excised without recurrence in the same session.