Fig 2. MR images of a 10-year-old boy with AT/RT in the vermis, extending into the fourth ventricle.

A, Axial (TR/TE, 600/11) MR image shows the tumor to have mixed intermediate signal intensity as well as irregular zones of high signal intensity secondary to hemorrhage (methemoglobin).

B, Axial (TR/TE, 3500/108) MR image shows the tumor to have heterogeneous mixed low, intermediate, and high signal intensity.

C, Axial (TR/TE, 500/29) MR image shows contrast enhancement in less than two thirds of the AT/RT. This patient is alive without evidence of disease 9 years after surgery/initial diagnosis.