title: Congenital absence of the anterior cruciate ligament associated with a ring meniscus.
mesh_terms: D000368:Aged; D002358:Cartilage, Articular / Q000002:abnormalities*; D006801:Humans; D007717:Knee / Q000002:abnormalities; D008023:Ligaments, Articular / Q000002:abnormalities*; D008297:Male