title: Ganglion cysts of the knee: articular communication revealed by delayed radiography and CT after arthrography.
abstract: OBJECTIVE
  The diagnosis of ganglion cysts of articular origin may sometimes be uncertain when communication with the joint is not evident. Because we have observed that opacification of ganglion cysts revealed by arthrography can be significantly delayed, the purpose of this study was to determine retrospectively in 20 cases the time delay needed to show with arthrography a communication between the articular cavity and ganglion cysts of the knee.
  
  
  CONCLUSIONS
  Arthrographic evidence of a communication between the articular cavity of the knee and communicating ganglion cysts requires delayed radiography performed at least 1 hr after intraarticular injection of contrast material. The best results are obtained with additional CT performed 1-2 hr after injection.
authors.affiliation: Department of Radiology, Louvain University, St-Luc Hospital, Brussels, Belgium.
authors.forename: J
authors.initials: J
authors.lastname: Malghem
authors.forename: B C
authors.initials: BC
authors.lastname: Vande berg
authors.forename: C
authors.initials: C
authors.lastname: Lebon
authors.forename: F E
authors.initials: FE
authors.lastname: Lecouvet
authors.forename: B E
authors.initials: BE
authors.lastname: Maldague
mesh_terms: D000328:Adult; D000368:Aged; D001175:Arthrography; D003287:Contrast Media / Q000008:administration & dosage; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013581:Synovial Cyst / Q000175:diagnosis* / Q000000981:diagnostic imaging; D013997:Time Factors; D014057:Tomography, X-Ray Computed
chemical_list: D003287:Contrast Media