Common disorders of the knee.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001265:Athletic Injuries; D002357:Cartilage Diseases / Q000628:therapy; D002358:Cartilage, Articular / Q000293:injuries; D002648:Child; D002675:Child, Preschool; D050723:Fractures, Bone / Q000628:therapy; D050724:Fractures, Cartilage; D006801:Humans; D004204:Joint Dislocations / Q000628:therapy; D007717:Knee / Q000033:anatomy & histology; D007718:Knee Injuries; D008875:Middle Aged; D010003:Osteoarthritis / Q000209:etiology; D010007:Osteochondritis; D010329:Patella / Q000033:anatomy & histology / Q000293:injuries; D012421:Rupture; D052256:Tendinopathy / Q000628:therapy; D013708:Tendon Injuries / Q000628:therapy