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Posterior fossa tumor

Posterior fossa tumor has a very different differential in an adult as opposed to a child.


Although it is true that posterior fossa tumours are much more common in children than in adults the distribution does vary with age:

0 to 3 years of age: supratentorial > infratentorial

4 to 10 years of age: infratentorial > supratentorial

10 to early adult hood: infratentorial = supratentorial

adults: supratentorial > infratentorial

Overall 50-55% of all brain tumours in children are found in the posterior fossa.


Cerebellar metastases (most common)

Cerebellar hemangioblastoma

Cerebellar astrocytomas and medulloblastomas are rare in the posterior fossa of adults (<1% all tumours) An important space occupying lesion (the most common in fact) to remember is that of a stroke, which when subacute can mimic a tumour.


Clinical features


Differential diagnosis



Quarante et al report 2 new pediatric cases of posterior reversible encephalopathy syndrome (PRES) that developed after surgical resection of a posterior fossa tumor. Appropriate management includes supportive measures, antihypertensive agents, and antiepileptic drugs, if needed. Full recovery is the most likely outcome in line with previous articles 1).

Case series

Quarante LH, Mena-Bernal JH, Martín BP, Carrasco MR, Casado MJ, de Aragón AM, de Las Heras RS. Posterior reversible encephalopathy syndrome (PRES): a rare condition after resection of posterior fossa tumors: two new cases and review of the literature. Childs Nerv Syst. 2016 May;32(5):857-63. doi: 10.1007/s00381-015-2954-5. Epub 2015 Nov 19. Erratum in: Childs Nerv Syst. 2016 Apr;32(4):763. PubMed PMID: 26584552.
posterior_fossa_tumor.txt · Last modified: 2019/07/20 13:17 by administrador