title: Evaluation of cardiac tumors in children by electron-beam computed tomography: rhabdomyoma and fibroma.
abstract: BACKGROUND
  The most common cardiac tumors in young children are rhabdomyoma and fibroma, and prognosis depends on the tumor's characteristics. In the present study electron-beam computed tomography (EBT) was used to evaluate tumor characteristics and myocardial perfusion in 6 children with cardiac tumors.
  
  
  RESULTS
  Five children had rhabdomyomas and 1 had a fibroma. In the precontrast study, the computed tomography numbers of rhabdomyomas were higher and those of the fibroma were slightly lower than those of the normal myocardium. In the early postcontrast study, the size, location, shape and number of the tumor were clearly detected, and in the late postcontrast study, the fibrous characteristics of the tumor were seen. The fibroma contained calcification and 2 rhabdomyomas contained a fat density spot. In the cine-mode study, both the tumor and ventricular wall motion could be simultaneously evaluated. There was a filling defect of the left ventricular myocardium on the early postcontrast scan of 1 child with a rhabdomyoma and dyskinetic wall motion at the same region in the cine-mode study.
  
  
  CONCLUSIONS
  EBT was useful for evaluating tumor characteristics in children.
authors.affiliation: Department of Pediatrics, National Cardiovascular Center, Osaka, Japan. shisashi@res.yamanashi-med.ac.jp
authors.forename: Hisashi
authors.initials: H
authors.lastname: Sugiyama
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Naito
authors.forename: Shinya
authors.initials: S
authors.lastname: Tsukano
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Echigo
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Kamiya
mesh_terms: D002648:Child; D002675:Child, Preschool; D005260:Female; D005350:Fibroma / Q000000981:diagnostic imaging* / Q000473:pathology; D006338:Heart Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D006352:Heart Ventricles / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011859:Radiography; D012207:Rhabdomyoma / Q000000981:diagnostic imaging* / Q000473:pathology; D014055:Tomography, Emission-Computed / Q000295:instrumentation / Q000379:methods