title: Limp as unusual presentation of Langerhans' cell histiocytosis.
abstract: An isolated eosinophilic granuloma involving the posterior elements of a lumbar vertebra is reported in a 3-year-old boy presenting with progressive limp. Radiological investigations revealed osteolysis of the L5 right pedicle. MRI showed a well-defined homogeneous mass with nonspecific signal intensity. An unusual feature was the paravertebral muscular location of the largest part of the tumour indicating a possible soft tissue origin. Immunohistochemical studies were typical for Langerhans' cell histiocytosis.
  
  
  CONCLUSIONS
  A limp can be due to lumbar and paravertebral muscular location of Langerhans' cell histiocytosis.
authors.affiliation: Department of Paediatrics, Cliniques UCL de Mont-Godinne, Yvoir, Belgium.
authors.forename: E
authors.initials: E
authors.lastname: Bodart
authors.forename: J F
authors.initials: JF
authors.lastname: Nisolle
authors.forename: P
authors.initials: P
authors.lastname: Maton
authors.forename: M
authors.initials: M
authors.lastname: Delos
authors.forename: J P
authors.initials: JP
authors.lastname: Trigaux
authors.forename: C
authors.initials: C
authors.lastname: Gilliard
authors.forename: D
authors.initials: D
authors.lastname: Tuerlinckx
authors.forename: J
authors.initials: J
authors.lastname: Ninane
mesh_terms: D002675:Child, Preschool; D005684:Gait; D006646:Histiocytosis, Langerhans-Cell / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D006801:Humans; D008159:Lumbar Vertebrae; D008279:Magnetic Resonance Imaging; D008297:Male; D013122:Spinal Diseases / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery