title: Cytologic appearance of pigmented villonodular synovitis. A case report.
abstract: BACKGROUND
  Pigmented villonodular synovitis (PVNS) is a benign neoplasm of large joints. It may follow a locally aggressive course. The cytologic features of this neoplasm have not been characterized fully.
  
  
  METHODS
  A 70-year-old male presented with a lump in the left ankle joint. The histopathologic diagnosis was pigmented villonodular synovitis. Review of the cytologic smears revealed clusters of round and ovoid, bland-looking cells along with siderophages and binucleated and multinucleated giant cells.
  
  
  CONCLUSIONS
  When interpreted in the clinical context, fine needle aspiration cytology may render a correct preoperative diagnosis of pigmented villonodular synovitis.
authors.affiliation: Department of Pathology, Cancer Hospital and Research Institute, Gwalior, M.R., India. sanjiv_1961@usa.net
authors.forename: Sanjiv
authors.initials: S
authors.lastname: Gupta
authors.forename: Ravi Shankar
authors.initials: RS
authors.lastname: Mishra
mesh_terms: D000368:Aged; D000843:Ankle Joint / Q000473:pathology*; D001707:Biopsy, Needle; D015726:Giant Cells / Q000473:pathology; D006801:Humans; D008297:Male; D011300:Preoperative Care; D013582:Synovial Fluid / Q000166:cytology*; D013586:Synovitis, Pigmented Villonodular / Q000473:pathology*