PMC6874134_01
(A,B) T2W sagittal and dorsal, showing a large hyperintense space occupying mass in the cerebellum. (C) T1 post contrast sagittal, showing mild heterogeneous contrast enhancement, especially at the rim, (D) SWI transverse showing signal drop out centrally, consistent with hemorrhage.
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F1
MRI revealed a 3.1 x 2.4 x 2.3 cm ill-defined mass within the right cerebellar hemisphere (Figure 1).
Photomicrograph of medulloblastoma in a dog. Sheets of neoplastic polygonal to elongated cells with large basophilic nuclei and limited pale eosinophilic cytoplasm create the characteristic "small blue tumor" appearance. Further features include a brisk mitotic rate (arrowheads) and rare entrapped cerebellar Purkinje neurons (arrow). H&E. 40x magnification. Bar = 20 um.
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F2
Histopathology of the mass revealed a cell-dense mass composed of neoplastic polygonal to elongated cells arranged in dense sheets (Figure 2).