title: Protrusio acetabuli in neurofibromatosis: nondysplastic and dysplastic forms.
abstract: Protrusio acetabuli (PA) in neurofibromatosis is not well documented in the literature. Two forms of PA, a nondysplastic and dysplastic type, are noted. Twenty-one percent of hips (13 patients) in neurofibromatosis were found to have some form of acetabular protrusion abnormality. In the control group (83 patients) without stigmata of neurofibromatosis, only 9% of hips were associated with PA. The progressive dysplastic form of PA is usually associated with contiguous soft-tissue neurofibromas and lumbar dural ectasia. The nondysplastic, nonprogressive form has less of an association with regional soft-tissue abnormalities and almost no association with dural dysplasia.
authors.affiliation: Department of Radiology, Alfred I. duPont Institute, Wilmington, Delaware.
authors.forename: G A
authors.initials: GA
authors.lastname: Mandell
authors.forename: H T
authors.initials: HT
authors.lastname: Harcke
authors.forename: C I
authors.initials: CI
authors.lastname: Scott
authors.forename: P A
authors.initials: PA
authors.lastname: Caro
authors.forename: H J
authors.initials: HJ
authors.lastname: Einsig
authors.forename: J R
authors.initials: JR
authors.lastname: Bowen
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging / Q000473:pathology; D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D005270:Femur Head / Q000000981:diagnostic imaging / Q000473:pathology; D006617:Hip Dislocation / Q000209:etiology; D006801:Humans; D015994:Incidence; D007223:Infant; D007592:Joint Diseases / Q000145:classification / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000209:etiology* / Q000473:pathology; D007738:Kyphosis / Q000209:etiology; D008279:Magnetic Resonance Imaging; D008297:Male; D009456:Neurofibromatosis 1 / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology; D011859:Radiography; D012600:Scoliosis / Q000209:etiology