Abstract
Pigmented villonodular synovitis (PVNS) is caused by a proliferation of the synovial membrane and can be a rare cause of pain and locking of the knee. In its localized form, it can be removed arthroscopically. We describe in detail a step-by-step arthroscopic technique applied to treat a 27-year-old patient who had been suffering from pain and episodes of locking for a year and whose left knee MRI revealed an intra-articular mass. The formation was completely enucleated arthroscopically and histological analyses confirmed the diagnosis of localized PVNS. There were no complications, and the patient was symptom-free at the six-month follow-up with no clinical or radiological evidence of recurrence.
Highlights
Pigmented villonodular synovitis (PVNS) is a rare, benign condition, involving the proliferation of the synovial membrane, with an average annual incidence of 1.8 cases per 1 million population for intraarticular forms of the disease [1,2,3]
We describe in detail a step-by-step arthroscopic technique applied to treat a 27-year-old patient who had been suffering from pain and episodes of locking for a year and whose left knee MRI revealed an intra-articular mass
Arthroscopic excision is considered the gold standard in the treatment of localized PVNS (LPVNS) [10,11]
Summary
Pigmented villonodular synovitis (PVNS) is a rare, benign condition, involving the proliferation of the synovial membrane, with an average annual incidence of 1.8 cases per 1 million population for intraarticular forms of the disease [1,2,3]. T1-weighted turbo inversion recovery magnitude (TIRM) sequence, coronal plane, in which the mass can be seen between the lateral femoral condyle and the lateral tibial plateau (green arrow) It appears to be arising from the anterior attachment of the lateral meniscus (black arrow). View from the superolateral portal where the tumor appeared as a firm tan-yellow mass (blue arrow) and the patella was apparent (black arrow). A blunt trocar was used to access the tumor from the anteromedial portal (pink arrow), which was established under direct vision from the anterolateral portal (black arrow). Complete detachment of the tumor was achieved by the anteromedial portal (pink arrow) using a punch while viewing through the anterolateral portal (black arrow). At the six-month follow-up, the patient was symptom-free and had no clinical or radiological evidence of recurrence
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