Fig. 1

Dorsal (A, B, C), transverse (D) and sagittal (E) magnet resonance imagines of the brain with an intraventricular mass in a cat. The images represent as follows: A dorsal T1-weighted pre-contrast image, B dorsal T1-weighted post-contrast image, C dorsal T2 SPAIR image, D transverse GRASE image and E sagittal T2-weighted image. A focal, intra-ventricular, well demarcated, moderate to highly heterogeneous mass with inhomogeneous moderate to marked contrast enhancement is seen. This mass is heterogeneous, mostly hypointense on T1-weighted, T2-weighted, T2 SPAIR and GRASE images with hyperintensities and contrast enhancement mainly within the center of the mass (A-E). The space occupying intraventricular mass, leads to compression of the remaining brain parenchyma, internal hydrocephalus, marked supracollicular cerebrospinal fluid accumulation (E, white arrow), cerebellar herniation (E, white asterisk) and hydromyelia (E, white arrowhead)