Presentation
Young man with headaches.
Patient Data
Age: 30 years
Gender: Male
From the case:
Posterior fossa ependymoma
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Large intraventricular mass in the fourth ventricle extending bilaterally into the foramenae of Luschka.
Hydrocephalus has developed.
Case Discussion
The patient went on to have a resection.
Histology
The sections show a moderately cellular tumor, forming prominent perivascular pseudorosettes. The tumor cells form cuffs around blood vessels in a fibrillary background. The tumor cells have mildly enlarged round to elongated nuclei and inconspicuous nucleoli. Very occasional mitoses are seen. There is no endothelial cell hyperplasia or necrosis. Spots of microcalcification are present in the background.
Final diagnosis
The features are those of a posterior fossa ependymoma, NOS
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