Subependymoma: large and enhancing

Case contributed by A.Prof Frank Gaillard
Modality: MRI

Heterogeneously enhancing mass with several foci of blooming in 4th ventricle. 

Modality: CT

Heterogeneous mass with multiple specks of calcification in 4th ventricle.

Case Discussion

Final Diagnosis:

Cerebellum, 4th ventricle: subependymoma

Gross Description:

The specimen labelled "4th ventricular tumour in formalin" consists of
several pieces of pale to pink tissue of varying size submitted in a
cavitron container and measuring in aggregate up to 3.0 x 2.5 x 0.3cm,
submitted in toto as cassette "A" through "F".

Microscopy:

Sections show a low grade glial tumour with areas of calcification and
microcyst formation. The cysts contain colloid-like material. The tumour
cells are relatively small in size, with round to oval nuclei, and are
arranged in small linear clusters and around vessels, rendering a
perivascular pseudorosette pattern. A few areas display a modest increase in cellularity. For the most part, cellularity is relatively low. Mitotic activity is not conspicuous.

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Case Information

rID: 4955
Case created: 10th Nov 2008
Last edited: 28th Nov 2016
Inclusion in quiz mode: Included

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