title: Giant-cell tumor of the tendon sheath arising from the posterior cruciate ligament of the knee: a case report and review of the literature.
abstract: The localized form of a giant-cell tumor of the tendon sheath is uncommon and rarely intraarticular. While the sonographic findings are nonspecific, the magnetic resonance (MR) findings can be diagnostic. Relatively homogeneous iso- or marginal hyperintensity on T2-weighted sequences, lack of susceptibility effects due to hemosiderin, the demonstration of a fibrous capsule and the absence of adjacent joint involvement may help to differentiate localized and diffuse forms of giant-cell tumors of tendon sheaths and pigmented villonodular synovitis.
authors.affiliation: Department of Diagnostic Radiology, University of Texas M.D. Anderson Cancer Center, Houston 77030, USA.
authors.forename: D G
authors.initials: DG
authors.lastname: Sheppard
authors.forename: E E
authors.initials: EE
authors.lastname: Kim
authors.forename: A W
authors.initials: AW
authors.lastname: Yasko
authors.forename: A
authors.initials: A
authors.lastname: Ayala
mesh_terms: D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D016119:Posterior Cruciate Ligament / Q000000981:diagnostic imaging / Q000473:pathology; D013586:Synovitis, Pigmented Villonodular / Q000175:diagnosis* / Q000000981:diagnostic imaging; D014463:Ultrasonography