Fig. 5
A 7-year-old female patient complaining of headache and vomiting. Axial T1 (a), axial T2 (b), axial FLAIR (c), coronal T1 post contrast (d), sagittal T1 post-contrast (e)—posterior fossa SOL seen within fourth ventricle, extending to the right cerebellar hemisphere and right cerebellopontine angle. The mass measured 47 × 35 × 36 mm at its maximum AP, width, and CC diameters, it showed heterogeneous predominantly low SI at T1WI (a), high SI at T2 (b), and FLAIR sequence (c) with central breakdown, avid, and heterogenous enhancement after IV contrast injection (d), (e). Axial DWI (f), axial ADC (g)—the lesion showed restricted diffusion, ADC ratio—1.3, ADC values of the lesion—(1.006, 1.081, 1.087) × 103 mm2/s × 103 mm2/s, average 1.081 × 103, ADC value of the normal cerebellum—(0.789, 0.793, 0.797) × 103, average 0.793 × 103 mm2/s consistent with ependymoma confirmed by histopathology