title: Rhabdomyoma of the orbit in a child.
abstract: OBJECTIVE
  To study a case of rhabdomyoma of the orbit in a 16-month-old boy.
  
  
  METHODS
  The child had progressive right proptosis for 1 month. He underwent a computed tomographic scan, which showed an irregular right retrobulbar mass and partial resection.
  
  
  RESULTS
  Histologic examination disclosed well-differentiated striated muscle cells with a mixture of collagen fibers and immature striated muscle cells with centrally placed nuclei. The specimen lacked nuclear atypia, indicating benign rhabdomyoma of the orbit. During the 1 1/2-year follow-up, the patient did not receive additional treatment, and no regrowth occurred.
  
  
  CONCLUSIONS
  Rhabdomyoma can occur in the orbit of a child. Because of differences in treatment, rhabdomyoma must be distinguished from rhabdomyosarcoma.
authors.affiliation: Department of Ophthalmology, Osaka Medical Center, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Hatsukawa
authors.forename: A
authors.initials: A
authors.lastname: Furukawa
authors.forename: H
authors.initials: H
authors.lastname: Kawamura
authors.forename: S
authors.initials: S
authors.lastname: Sugimoto
authors.forename: S
authors.initials: S
authors.lastname: Mushiake
authors.forename: K
authors.initials: K
authors.lastname: Morimoto
mesh_terms: D006801:Humans; D007223:Infant; D008297:Male; D009918:Orbital Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D012207:Rhabdomyoma / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed