Fig 9. MR images of 4-year-old boy with AT/RT involving the vermis

A, Axial FLAIR (TR/TE/TI, 9000/119/2200) MR image shows the tumor to have mostly intermediate signal intensity that is isointense to gray matter.

B, Axial (TR/TE, 6000/99) MR image shows the tumor to have mostly intermediate-to-slightly-high signal intensity that is slightly hyperintense to gray matter, as well as small zones of high signal intensity.

C, Axial (TR/TE, 800/20) fat-suppressed MR image with magnetization transfer shows prominent slightly heterogeneous contrast enhancement of the tumor. This patient had gross total resection of the primary lesion followed by chemotherapy and has been disease-free for 4 years.

D, Axial DWI (b = 1000) shows the lesion to have high signal intensity.

E, Axial ADC map shows low signal intensity in the lesion, indicating restricted diffusion of water within the AT/RT.