Presentation
Chronic, almost daily suboccipital headache
Patient Data
Age: 35 years
Gender: Male
From the case:
Posterior fossa ependymoma
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- A large well-defined irregular shaped mass centered in the fourth ventricle causing downward displacement of the cerebellar tonsils beneath the foramen magnum into the cervical spinal canal.
- It is isointense to the cerebellum on T1-weighted images, hyperintense on T2 and FLAIR, Postcontrast images demonstrate vivid heterogeneous contrast enhancement.
- Dilated supratentorial ventricular system.
Case Discussion
Findings most likely represent a posterior fossa ependymoma.
The differential diagnosis of an intraventricular space-occupying lesion includes ependymoma and choroid plexus papilloma.
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