MICROSCOPIC DESCRIPTION: The sections show a moderately cellular tumour, forming perivascular pseudorosettes. The tumour cells form cuffs around blood vessels. There is mucoid material in-between the blood vessels and the tumour cells. The tumour cells have mildly enlarged round nuclei and small nucleoli. No mitoses are seen. There is no endothelial cell hyperplasia or necrosis. The features are those of myxopapillary ependymoma.
FINAL DIAGNOSIS: Myxopapillary ependymoma (WHO Grade I).