43-year-old female with a known cavernoma. Reason: 3T Scanner, CCM Protocol, QSM/permeability, solitary CCM vs tumor History: surveillance; HAs, vertigo, difficulty w balance. Redemonstrated is a 4 x 6 mm (transaxial dimension) T1 and T2 hypointense lesion in the left pons that demonstrates susceptibility abnormality. Stable peripheral enhancement surrounding the central hypointensity is again noted indicating an anomalous draining vein. There is no perilesional edema. These findings are unchanged compared to the prior exam and are compatible with a small cavernous malformation. There are no other similar appearing foci.There is no evidence of acute infarct. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. Scattered mucosal thickening can be found and the paranasal sinuses without superimposed fluid levels. Mastoid air cells are clear. The orbits, skull, and scalp soft tissues are grossly unremarkable.
Stable small cavernous malformation of the left pons and adjacent small anomalous draining vein.