Question

question 32 (mandatory) (2 points)
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a 5 - year old boy presents with projectile vomiting and progressive ataxia. workup finds obstructive hydrocephalus due to an infiltrative tumor originating in the cerebellum. what is the most likely diagnosis for this tumor of the cerebellum?
oligodendroglioma
medulloblastoma
ependymoma
glioblastoma multiforme

Explanation:

Medulloblastoma is a common malignant tumor in children, often occurring in the cerebellum. Symptoms like projectile vomiting (due to increased intracranial pressure from obstructive hydrocephalus) and progressive ataxia are typical for cerebellar - related tumors in children. Oligodendrogliomas are more common in adults and usually in the cerebral hemispheres. Ependymomas can occur in various locations including the cerebellum but are less characteristic in this pediatric context. Glioblastoma multiforme is a highly aggressive adult - type glioma and not typical in a 5 - year - old child.

Answer:

B. Medulloblastoma