DOI: 10.1148/radiol.2393050253
Osteoarthritis of the Knee: Association between Clinical Features and MR Imaging Findings1
Peter R. Kornaat, MD,
Johan L. Bloem, MD,
Ruth Y. T. Ceulemans, MD,
Naghmeh Riyazi, MD,
Frits R. Rosendaal, MD,
Rob G. Nelissen, MD,
Wayne O. Carter, DVM, PhD,
Marie-Pierre Hellio Le Graverand, MD and
Margreet Kloppenburg, MD
1 From the Departments of Radiology (P.R.K., J.L.B.), Rheumatology (N.R., M.K.), Clinical Epidemiology (M.K., F.R.R.), and Orthopaedic Surgery (R.G.N.), Leiden University Medical Center, Albinusdreef 2, NL-2333 ZA Leiden, the Netherlands; Department of Radiology, Northwestern Medical Faculty Foundation, Chicago, Ill (R.Y.T.C.); and Pfizer Groton, Groton, Conn (W.O.C., M.P.H.L.G.). Received February 15, 2005; revision requested April 13; revision received May 15; accepted June 13; final version accepted August 11. Supported by Pfizer Groton.
Address correspondence to P.R.K. (e-mail: P.R.Kornaat{at}lumc.nl).

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Transverse T2-weighted MR image (2500/40) shows moderate joint effusion (black arrow) associated with pain and stiffness of the knee. Note the presence of a Baker cyst (white arrow) and external markers (arrowheads).
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Copyright © 2006 by the Radiological Society of North America.