Male, 55 years old, with history of cavernoma and seizures. A lesion is evident centered on the left amygdala and hippocampal head showing bubbly internal T2 hyperintensity with a rim of susceptibility effect. This lesion measures up to 21 x 14 mm on the axial T2 weighted sequence (image 11 series 401). The lesion contacts the temporal horn of the left lateral ventricle. There is only minimal associated mass effect. The left basal vein of Rosenthal is somewhat prominent, but apart from this, there is no clear evidence of an associated developmental venous anomaly.No additional susceptibility inducing foci are seen within the brain. A developmental venous anomaly is, however, present within the right superior frontal gyrus. No pathologic parenchymal or extra-axial enhancement is observed.Diffusion-weighted images are unremarkable. A few scattered small foci of T2 hyperintensity are demonstrated in the cerebral white matter, the basal ganglia on the left thalamus, a nonspecific finding. No parenchymal edema or significant mass effect is observed. No abnormal extra-axial fluid collections are identified. The ventricular system is normal in size and morphology.Opacification of the right mastoid air cells is seen. Bone marrow signal characteristics are unremarkable.
1.Cavernous malformation of the left medial temporal lobe with involvement of the amygdala and hippocampal head. Although the adjacent left basal vein of Rosenthal is slightly prominent, no definite evidence of an associated developmental venous anomaly is seen.2.No additional susceptibility inducing lesions are seen in the brain. Incidental note is made of a developmental venous anomaly in the right superior frontal gyrus.