title: Decreased interposition after closed reduction in the hip joint: a case of developmental dislocation of the hip observed by MRI.
abstract: A 4-month-old Japanese girl with a developmental dislocation of the right hip was treated with manual reduction under general anesthesia followed by cast immobilization. Serial magnetic resonance imaging (MRI) revealed that a large interposition of fat tissue in the acetabulum, observed immediately after cast immobilization, became remarkably small in size as the congruity improved after 3 weeks. These MRI findings demonstrate the mechanism of a "squeezing phenomenon" after reduction of the hip.
authors.affiliation: Department of Orthopedic Surgery, Akita University School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan.
authors.forename: Wataru
authors.initials: W
authors.lastname: Watanabe
authors.forename: Eiji
authors.initials: E
authors.lastname: Itoi
authors.forename: Shin
authors.initials: S
authors.lastname: Yamada
authors.forename: Ryuji
authors.initials: R
authors.lastname: Sashi
mesh_terms: D002370:Casts, Surgical; D005260:Female; D005270:Femur Head; D006618:Hip Dislocation, Congenital / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007103:Immobilization; D007223:Infant; D008279:Magnetic Resonance Imaging