Ring-shaped lateral meniscus.
The existence of abnormal-shaped menisci has been long recognized. The presence of discoid menisci in the human knee is considered to be a congenital malformation with a very low rate of incidence except in Asian populations. Since the publication of Watanabe's Atlas, three types of lateral meniscal abnormalities are generally accepted: the complete and incomplete discoid, as well as the Wrisberg-ligament type meniscus. The present case is the second description of a ring-shaped meniscus on the lateral side of the knee and we propose that this variant be included as a fourth variant in a future classification.
Department of Orthopaedic Surgery, Hospital del Mar, Universidad Autónoma de Barcelona, Spain.
J C
JC
Monllau
A
A
León
R
R
Cugat
J
J
Ballester
D000328:Adult; D018771:Arthralgia / Q000175:diagnosis / Q000209:etiology*; D001182:Arthroscopy / Q000379:methods; D004724:Endoscopy; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008592:Menisci, Tibial / Q000002:abnormalities* / Q000601:surgery; D010147:Pain Measurement; D016059:Range of Motion, Articular