Quadrigeminal cistern arachnoid cyst causing hydrocephalus

Case contributed by Dr Ayaz Hidayatov


Pediatric patient with nystagmus and increased calvarial size.

Patient Data

Age: 2 years
Gender: Male

MR reveals large supratentorial arachnoid cyst in the quadrigeminal cistern, which was measured 32 x 25 x 20 mm. The cyst is isointense to CSF in all sequences. There is no diffusion restriction. Cyst is compressing the tectum, narrowing the aqueduct, and causing hydrocephalus.

Lateral ventricles and third ventricle were dilated. 

Case Discussion

The quadrigeminal cistern is an uncommon location for an arachnoid cyst. Most arachnoid cysts are asymptomatic, but in rare cases large quadrigeminal cistern arachnoid cysts cause narrowing and stretching of the aqueduct causing hydrocephalus. 

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Case information

rID: 61322
Published: 28th Jun 2018
Last edited: 16th Jul 2018
Inclusion in quiz mode: Included
Institution: Medistyle hospital

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