title: Primary protrusion of the acetabulum.
mesh_terms: D000077:Acetabulum / Q000601:surgery; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001178:Arthroplasty; D001848:Bone Diseases, Developmental / Q000000981:diagnostic imaging / Q000235:genetics / Q000378:metabolism / Q000601:surgery; D005260:Female; D005269:Femur / Q000601:surgery; D005270:Femur Head; D006621:Hip Joint; D006801:Humans; D007592:Joint Diseases; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D010027:Osteotomy; D010375:Pedigree; D011859:Radiography; D012737:Sex Factors