title: Transient osteoporosis of the knee.
abstract: The MR findings in transient osteoporosis of the knee have been described as showing a diffuse area of decreased signal intensity (relative to normal bone marrow) on T1-weighted images and increased signal intensity on T2-weighted images. We report a case of transient osteoporosis, in which MRI showed a crescentic area of abnormal signal intensity in the posterior portion of the lateral femoral condyle, which was bordered by a rim of low signal intensity, best seen on the T2-weighted images. This abnormality was shown to resolve on follow-up MR scans.
authors.affiliation: Department of Diagnostic Radiology, St. Francis Medical Center, Pittsburgh PA 15201, USA.
authors.forename: R K
authors.initials: RK
authors.lastname: Parker
authors.forename: G J
authors.initials: GJ
authors.lastname: Ross
authors.forename: J A
authors.initials: JA
authors.lastname: Urso
mesh_terms: D000368:Aged; D005269:Femur / Q000002:abnormalities; D005500:Follow-Up Studies; D006801:Humans; D007717:Knee / Q000000981:diagnostic imaging / Q000473:pathology*; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D010024:Osteoporosis / Q000175:diagnosis* / Q000209:etiology; D011859:Radiography