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Washington University Experience | NEOPLASMS (GLIAL) | Ependymoma, myxopapillary | 13D4 Ependymoma, myxopapillary (Case 13) (collagen balloons) Trichrome 10

Trichrome stain highlights the collagenous thickening of the vasculature and strongly stains collagen balloons. The tumor cells show focal dot-like positivity with D2-40. An epithelial membrane antigen is negative. The tumor has an overall low proliferation rate, although it reaches ~3.8% focally.

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