Blake's pouch cyst

Case contributed by Joseph Scheller
Diagnosis certain


Infant with macrocephaly and "sunset eyes".

Patient Data

Age: 2 months
Gender: Male

Severely dilated ventricles. Blake's pouch cyst. Extra axial fluid collection.


Right extra axial fluid collection. Small left posterior subacute subdural hematoma. Dilated lateral and third ventricles. Blake's pouch cyst. Normal appearing cerebellar vermis

Case Discussion

Blake's pouch cyst is a developmental abnormality of the posterior fossa that causes hydrocephalus. In this case the hydrocephalus was severe and present at age 2 months, and there is associated developmental delay.

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