Multiple cavernous malformations

Status post right occipital craniotomy, with post-surgical changes. Right cerebellar hematoma measuring 2.5 x 3.0 x 3.4 cm, containing blood degradation products of different ages - some chronic and some subacute, still with perifocal edema, exerting pressure on the fourth ventricle.
​Status post right frontal craniotomy, with encephalomalacia and gliosis at the anterior aspect of the right frontal lobe.
Multiple bilateral cavernomas in the cerebellum, with accompanying venous angioma on left.
Cavernomas in the midbrain and the pons.
Multiple cavernomas in both cerebral hemispheres containing blood degradation products of different ages; area of subacute hematoma in left frontal parasagittal cavernoma and right parietal cavernoma, while all others contain hemosiderin, without perilesional edema or substantial mass effect. Distortion of diffusion due to blood degradation products in the cavernomas.
Herniation of right cerebellar tonsil into foramen magnum due to the right cerebellar hematoma.
After gadolinium administration, some of the cavernomas show typical punctate enhancement.
In comparison to the previous scan, mild improvement in the right cerebellar hematoma and mild regression of pressure on fourth ventricle. All other findings unchanged.
Mucosal thickening in the paranasal sinuses, cysts in the maxillary sinuses.

Impression:
Multiple cavernomas, unchanged since previous scan.
Status post right frontal craniotomy, unchanged.
Status post right occipital craniotomy. Large hematoma still in right cerebellum, with mass effect; slight improvement.