Intra-articular membranous interposition detected by MRI in developmental dysplasia of the hip.
Intra-articular membranous interposition was detected by MRI in the hip joint with residual subluxation of a girl aged 5 years 10 months. This structure, which had low signal intensity on both T1- and T2-weighted images, separated the femoral head from the acetabulum. Histological examination revealed chondrometaplasia, which suggested that this interposition might be transformed to a surface cartilaginous tissue of the secondary acetabulum often observed in residual subluxation of the hip.
Department of Orthopedic Surgery, Akita University School of Medicine, Japan.
W
W
Watanabe
E
E
Itoi
K
K
Sato
D000077:Acetabulum / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D005270:Femur Head / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D006618:Hip Dislocation, Congenital / Q000175:diagnosis* / Q000601:surgery; D006621:Hip Joint / Q000002:abnormalities* / Q000601:surgery; D006801:Humans; D008023:Ligaments, Articular / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D008279:Magnetic Resonance Imaging; D011859:Radiography; D012720:Severity of Illness Index