Fetal and postnatal MRI findings of Blake pouch remnant causing obstructive hydrocephalus

Blake pouch remnant, also known as Blake pouch cyst or persistent Blake pouch, is a posterior fossa embryologic anomaly that is often seen in isolation with most affected patients being asymptomatic. However, even in isolation, Blake pouch remnant can result in obstructive hydrocephalus requiring ea...

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Bibliographic Details
Published in:Radiology case reports 2020-12, Vol.15 (12), p.2535-2539
Main Authors: Nagaraj, Usha D., Kline-Fath, Beth M., Calvo-Garcia, Maria A., Vadivelu, Sudhakar, Venkatesan, Charu
Format: Article
Language:English
Subjects:
Blake pouch
Case Report
Fetal MRI
Ventriculomegaly
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Description
Summary:Blake pouch remnant, also known as Blake pouch cyst or persistent Blake pouch, is a posterior fossa embryologic anomaly that is often seen in isolation with most affected patients being asymptomatic. However, even in isolation, Blake pouch remnant can result in obstructive hydrocephalus requiring early neurosurgical intervention making it an important diagnosis for the fetal radiologist to consider. We present a rare case of a patient with prenatally diagnosed “inferior vermian hypoplasia” on fetal MRI that went on to develop progressive obstructive hydrocephalus in infancy secondary to what was determined to be a Blake pouch remnant.
ISSN:1930-0433
1930-0433
DOI:10.1016/j.radcr.2020.09.039