Recurrent subluxation of the patella on extension of the knee.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D005260:Female; D006801:Humans; D004204:Joint Dislocations / Q000209:etiology*; D007717:Knee / Q000002:abnormalities; D008023:Ligaments, Articular; D008297:Male; D009069:Movement Disorders / Q000150:complications*; D010329:Patella / Q000293:injuries*; D013977:Tibia / Q000002:abnormalities