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Epidemiology of Brainstem Gliomas in Children

This page was last updated on May 9th, 2017

Incidence and Prevalence

  • 10–20% of CNS tumors in children: 150–300 cases of pediatric brainstem tumors arise in the United States each year, representing 10–20% of all CNS tumors in children (6, 9, 10).  75% of all brainstem tumors are diffuse gliomas (6).
  • Diffuse intrinsic pontine gliomas = 75%: Approximately 75% of brainstem gliomas are diffuse intrinsic pontine gliomas. Consequently, 120–240 diffuse intrinsic pontine gliomas are diagnosed in the United States each year.
  • Dorsally exophytic gliomas = 10–20%: Dorsally exophytic tumors represent 10–20% of brainstem tumors. Between 15 and 60 such tumors are diagnosed in the United States each year.
  • Cervicomedullary gliomas = 5–10%: Cervicomedullary gliomas represent 5–10% of brainstem tumors.  Between 7 and 30 new cervicomedullary tumors are diagnosed in the United States each year.
  • Midbrain tumors: These lesions are rare and most studies in the literature are case reports.

Age Distribution

  • 6.5 years median age at presentation: Brainstem tumors in all subgroups are primarily seen in children ages 6–9 years (median age 6.5 years), although they have been diagnosed in patients of all ages (6, 9-12).

Sex Predilection

  • None: There appears to be an equal distribution between males and females for all brainstem tumor subgroups (6, 9, 11, 12).

Geographic Distribution

  • Not known: Sufficient data are not available to determine if there is a geographic propensity to brainstem gliomas.

Risk Factors

  • None known: No specific risk factors have been described relating environmental or infectious agents to the incidence of brainstem gliomas.

Relationships to Other Disease States and Syndromes

  • Neurofibromatosis: Pollack et al. have described an apparent association in patients between NF1 and the incidence of brainstem gliomas. These tumors, whether diffuse or focal, appear to have a more benign course compared with tumors from patients without NF1 (6, 14-15).

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