title: Tectal Lesions in Children: A Long-Term Follow-Up Volumetric Tumor Growth Analysis in Surgical and Nonsurgical Cases.
abstract: OBJECTIVE
  Different tectal masses have been described; most are low-grade gliomas. Only 20-30% of all lesions grow, as shown on follow-up MRIs, requiring surgical resection at some point. The aim of this study is to describe the experience of a single institution managing pediatric patients with tectal lesions.
  
  
  METHODS
  We retrospectively studied and analyzed 40 children with tectal lesions managed from 1990 to 2006; the mean age at diagnosis was 9.4 years. A volumetric classification was used to analyze tumor growth trends. More than 1 year of imaging follow-up was available for 23 patients.
  
  
  CONCLUSIONS
  Medium- and large-volume-size lesions were associated with the need for surgery. About half of the nonsurgical lesions grew at least 50% over a period of 4.5 years and did not require surgical resection.
authors.affiliation: Division of Pediatric Neurosurgery, Department of Neurological Surgery, Children's Medical Center, University of Texas Southwestern, Dallas, Tex., USA.
authors.forename: Amir
authors.initials: A
authors.lastname: Kershenovich
authors.forename: Zmira
authors.initials: Z
authors.lastname: Silman
authors.forename: David
authors.initials: D
authors.lastname: de Rungs
authors.forename: Korgun
authors.initials: K
authors.lastname: Koral
authors.forename: Lynn
authors.initials: L
authors.lastname: Gargan
authors.forename: Bradley
authors.initials: B
authors.lastname: Weprin
mesh_terms: D000293:Adolescent; D001706:Biopsy; D001932:Brain Neoplasms / Q000473:pathology* / Q000601:surgery; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D005910:Glioma / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D019635:Neurosurgical Procedures; D012189:Retrospective Studies; D047368:Tumor Burden