Fig. 2

Typical presentation of brainstem necrosis on MRI of a 37-year-old woman, 18 months after IMRT. Significant edema and irregular enhancement in the high-dose area of the left pons was observed. a IMRT dose distribution around the brainstem, in which the max dose was located in the left front of pons; (b) T2-weighted image; and (c) contrast-enhanced T1-weighted image