The picture of the sinuses is that of chronic sinusitis. Chronic inflammation/ recurrent infections of the sinuses leads to mucosal thickening. Areas of gliosis represent areas of healed previous damage within the brain. This could be old small non-significant infarctions (defect in blood supply). This has to be correlated clinically. Minimal ectopia of the cerebellar tonsils means they are slightly descended below their normal positions. This also has to be correlated clinically. It could be a normal variant.