"Caseous substance creates the target core, but peripheral infective granulation tissues form the high signal rim that enhances on post-gadolinium study 2."
"Early-stage tuberculoma is characterised by a severe inflammatory response that results in extensive surrounding oedema. The gel capsule has not properly formed at this point and enhancement following contrast examination is uniform. In this phase it is usually isointense on T1 and T2 with homogenous post contrast enhancement 5."