title: [Semidiscoid lateral meniscus].
abstract: We propose a new entity known as "semidiscoid lateral meniscus" of the knee. The diagnostic criteria for semidiscoid lateral meniscus is the appearance on a thin-sliced axial 3-D image of a crescent-shaped meniscus whose transverse width is within 11.6 mm to 14.3 mm on the coronal image. These numerical values were calculated by discriminant analysis. A retrospective review of MR examinations of the knees revealed 15 patients (15 knees) with this entity. These patients were our subjects. Of these 15 patients, complicated lateral meniscal tears were seen in only three cases. Nine knees were free from complications, and five were asymptomatic. Six patients were examined with MR on the contralateral side, and discoid lateral menisci were revealed in all cases. Thus semidiscoid lateral meniscus shows a cross-relationship with discoid menisci.
authors: Department of Radiology, Osaka Rosai Hospital.
authors: Y
authors: Y
authors: Araki
authors: T
authors: T
authors: Ishida
authors: M
authors: M
authors: Ootani
authors: H
authors: H
authors: Yamamoto
authors: T
authors: T
authors: Yamamoto
authors: H
authors: H
authors: Nakamura
authors: I
authors: I
authors: Tsukaguchi
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D016002:Discriminant Analysis; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D007718:Knee Injuries / Q000175:diagnosis* / Q000453:epidemiology; D008279:Magnetic Resonance Imaging; D008297:Male; D008592:Menisci, Tibial / Q000473:pathology; D008875:Middle Aged; D012189:Retrospective Studies; D009626:Terminology as Topic; D000070600:Tibial Meniscus Injuries