Myxopapillary ependymoma and fatty filum

Case contributed by RMH Neuropathology

Patient Data

Age: 73 years
Gender: Female
MRI

MRI spine

Limited sagittal images (digitized printed film) demonstrate an enhancing mass below the conus, associated with a fatty filum terminale. 

Pathology

Histology

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 ovoid nuclei and small nucleoli. Mitoses are inconspicuous. There is no microvascular proliferation or necrosis. The tumour cells are GFAP positive. The Ki-67 index is 1%. They are EMA negative. The features are those of myxopapillary ependymoma.

DIAGNOSIS: Spinal tumour: Myxopapillary ependymoma (WHO Grade I).

Case Discussion

Spinal myxopapillary ependymomas are a variant type of spinal ependymoma that occur exclusively in the conus medullaris and filum terminale.

Fatty filum terminale is a relatively common finding on imaging of the lumbar spine, and in most cases is an incidental finding of no clinical concern.

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Case information

rID: 34356
Case created: 17th Feb 2015
Last edited: 7th Sep 2015
Inclusion in quiz mode: Included

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