title: Proliferative myositis in a child.
abstract: A case of proliferative myositis in the lumbar paraspinal muscles in a 14-year-old boy is presented. Imaging investigations including plain radiograph, ultrasound, computed tomography (CT), magnetic resonance imaging (MRI), bone scan and positron emission tomography (PET) were suggestive of an inflammatory process such as myositis ossificans. The diagnosis was made by incisional biopsy. More pronounced edema, more muscle fiber necrosis and a higher cellularity were found compared to adult cases. The karyotype of the lesion was normal. Clinically, the mass disappeared spontaneously. After 24 months, asymptomatic bridging ossification between the third and fourth lumbar vertebrae was noted.
authors.affiliation: Department of Surgical Oncology, University Hospital Gasthuisberg, Leuven, Belgium.
authors.forename: S
authors.initials: S
authors.lastname: Mulier
authors.forename: M
authors.initials: M
authors.lastname: Stas
authors.forename: J
authors.initials: J
authors.lastname: Delabie
authors.forename: L
authors.initials: L
authors.lastname: Lateur
authors.forename: M
authors.initials: M
authors.lastname: Gysen
authors.forename: P
authors.initials: P
authors.lastname: Dal Cin
authors.forename: C
authors.initials: C
authors.lastname: Robberecht
authors.forename: I
authors.initials: I
authors.lastname: De Wever
mesh_terms: D000293:Adolescent; D001707:Biopsy, Needle; D006801:Humans; D008161:Lumbosacral Region; D008279:Magnetic Resonance Imaging; D008297:Male; D018482:Muscle, Skeletal / Q000473:pathology; D009220:Myositis / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D012600:Scoliosis / Q000209:etiology; D014055:Tomography, Emission-Computed; D014057:Tomography, X-Ray Computed