CC-BY-NC-ND 4.0 · Joints 2017; 05(03): 184-187
DOI: 10.1055/s-0037-1605586
Case Report
Georg Thieme Verlag KG Stuttgart · New York

All-Arthroscopic Treatment of Intra- and Extra-Articular Localized Villonodular Synovitis of Knee

Roberto Simonetta1, Michela Florio2, Filippo Familiari3, Giorgio Gasparini3, Michele Attilio Rosa2
  • 1Department of Orthopaedic and Trauma Surgery, C.O.T. Cure Ortopediche Traumatologiche, Messina, Italy
  • 2Department of Orthopaedic & Trauma Surgery, Messina University, Messina, Italy
  • 3Department of Orthopaedic and Trauma Surgery, Magna Graecia University of Catanzaro, Catanzaro, Italy
Further Information

Publication History

Publication Date:
08 August 2017 (eFirst)


Pigmented villonodular synovitis (PVNS) is a rare, benign, proliferative neoplastic condition affecting synovial-lined anatomic spaces. PVNS is characterized by hypertrophy of a synovial membrane by villous, nodular, and villonodular proliferation, with pigmentation secondary to hemosiderin deposition. The two forms of PVNS that have been described are diffuse (DPVNS) and localized (LPVNS). The knee is the most commonly involved anatomic location, followed by hip, ankle, shoulder, and elbow. Diagnosis of PVNS is not always obvious clinically. Various imaging modalities are often necessary to exclude other conditions and narrow the diagnosis. Magnetic resonance imaging has become the modality of choice for diagnosing PVNS. We present a case of intra-articular LPVNS with an extra-articular extension through the posterior capsule that has been successfully removed in an all-arthroscopic fashion.