Clinical question: History of venous malformation years ago, needs reevaluation. Signs and symptoms: Normal exam. Pre-and post-enhanced brain MRI:No diffusion weighted abnormalities.Images through posterior fossa demonstrates a large left cerebellar hemispheric developmental venous anomaly which extensively involve the left cerebellar hemisphere on susceptibility MRI sequence. There is no associated mass effect or parenchymal signal abnormality and in particular no evidence of an associated cavernoma is present. There is expected uniform enhancement of the developmental venous anomaly. On T1-weighted images there are punctate and thin linear T1 hyperintensity along the superior surface of the this in the midline which also demonstrates subsequently signal changes. On post enhanced images there is continued T. of the enhancement of left cerebellar developmental venous anomaly with this finding along the superior surface of the vermis in the midline. The finding could represent calcification and off questionable clinical significance. There are no prior exams for comparison.Images through supratentorial space normal anatomical morphology and with normal signal intensity of brain parenchyma on all MRI sequences. The cerebral cortex, cortical sulci, ventricular system, CSF spaces and brain myelination remains within normal.The signal void of major intracranial arterial branches are identified.The signal intensity of intracranial venous sinuses are normal and with normal pattern of enhancement.Unremarkable images through the orbits and including axial fat sat post enhanced series.Normal pneumatization signal pattern of bilateral mastoid air cells, middle ear cavities and the paranasal sinuses.
1.Negative diffusion weighted images.2.Left cerebellar hemispheric developmental venous anomaly as detailed. There are no prior exams for comparison.3.Unremarkable pre-and post enhanced brain MRI otherwise.