title: Acetabular development after bipolar hemiarthroplasty for osteosarcoma in children.
abstract: A retrospective analysis was performed of eight patients with an open triradiate cartilage, who underwent resection for osteosarcoma and reconstruction of the proximal femur with a hemiarthroplasty, in order to identify changes of acetabular development. An analysis of the centre-edge angle, teardrop-to-medial prosthesis distance, superior joint space, teardrop-to-superior prosthesis distance, degree of lateral translation, and arthritic changes, was performed on serial radiographs. The median age at the time of the initial surgery was 11 years (5 to 14). All patients developed progressive superior and lateral migration of the prosthetic femoral head. Following hemiarthroplasty in the immature acetabulum, the normal deepening and enlargement of the acetabulum is arrested. The degree of superior and lateral migration of the prosthetic head depends on the age at diagnosis and the length of follow-up.
authors.affiliation: Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.
authors.forename: M W
authors.initials: MW
authors.lastname: Manoso
authors.forename: P J
authors.initials: PJ
authors.lastname: Boland
authors.forename: J H
authors.initials: JH
authors.lastname: Healey
authors.forename: W
authors.initials: W
authors.lastname: Tyler
authors.forename: C D
authors.initials: CD
authors.lastname: Morris
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging / Q000254:growth & development*; D000293:Adolescent; D000367:Age Factors; D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery*; D002648:Child; D002675:Child, Preschool; D005260:Female; D005266:Femoral Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery*; D005269:Femur / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D012516:Osteosarcoma / Q000000981:diagnostic imaging / Q000601:surgery*; D011183:Postoperative Complications / Q000209:etiology; D011474:Prosthesis Design; D011859:Radiography; D012086:Reoperation; D012189:Retrospective Studies