Fig 2. Thin wall enhancement pattern of the surgical cavity found on post-CCRT magnetic resonance (MR) imaging from a 71-year-old patient after gross total resection of glioblastoma.

(a and b) Pre- and post-contrast enhanced T1 WI shows thin linear enhancement along the surgical cavity wall. (c) DWI and corresponding (d) ADC map suggest the possibility of diffusion restriction. However, considering the dark signal intensity on SWI (e), high SI on DWI reflects hemorrhage and does not suggest true diffusion restriction. (f) After 20 months, on the last follow up image, no measurable enhanced lesion is shown on contrast-enhanced T1WI.