Figure 2.

Conventional MR sequences: necrosis and hemorrhages. Right deep thalamo-capsular IDH-wt GB. The lesion shows a necrotic core (asterisk in (B,F)) and a thick and irregular rim of hypercellular tissue with restricted diffusion (C,D) and contrast-enhancement ((F) compared to (E)). (G,H) demonstrate hemosiderin marginal deposits (hypointense on both SWI and phase-map respectively) suggestive of intratumoral bleedings. The “rim enhancing” lesion is surrounded by a peripheral heterogeneous area of abnormal T2w/FLAIR signal (A,B), reflecting infiltrative “non enhancing” tumor and vasogenic edema that also involves the mesial surface of the contralateral thalamus and hypothalamus (arrow in (B). The caudal extension determines stenosis of the Sylvian aqueduct and consequently supratentorial hydrocephalus.