title: Pigmented villonodular synovitis: extrasynovial recurrence.
abstract: A 32-year-old female athlete underwent arthroscopy for a second recurrence of pigmented villonodular synovitis (PVNS), which was extrasynovial, seen on magnetic resonance imaging. It was noted on arthroscopy that (1) the nodules moved medially with joint insufflation, (2) the nodules were less prominent than on magnetic resonance imaging, and (3) more than 95% of the recurrent tumor was hidden by neosynovium. We believe that the extrasynovial location is because of the more rapid proliferation of the neosynovium relative to the growth of the remaining tumor cells after the previous resection. In resecting pigmented villonodular synovitis with a high risk of recurrence, a layer of periarticular fat should be removed and the surgeon should be wary of change in position with insufflation.
authors: Department of Orthopaedic Surgery, School of Medicine, Loma Linda University, Loma Linda, California 92354, USA. cjobe@llu.edu
authors: Christopher M
authors: CM
authors: Jobe
authors: Anwar
authors: A
authors: Raza
authors: Lee
authors: L
authors: Zuckerman
mesh_terms: D000273:Adipose Tissue / Q000601:surgery; D000328:Adult; D001182:Arthroscopy; D005260:Female; D006801:Humans; D006833:Hydrarthrosis / Q000209:etiology / Q000601:surgery; D007327:Insufflation; D007590:Jogging / Q000293:injuries; D007719:Knee Joint / Q000601:surgery*; D008279:Magnetic Resonance Imaging; D012008:Recurrence; D013586:Synovitis, Pigmented Villonodular / Q000473:pathology / Q000601:surgery*