 A surgical defect is noted involving the right parietal lobe, specifically containing an encephalomalacic cavity lined with hypointensity, most prevalent on susceptibility technique. A small developmental venous anomaly is immediately posterior. Expected overlying calvarial changes are evidence of the prior craniectomy.There are several other punctate lesions identified on susceptibility weighted imaging throughout the supratentorial and infratentorial brain, none of which demonstrate mass effect or perilesional edema.The ventricles and sulci are normal in size. The cerebellar tonsils are in normal position. There is no mass effect or midline shift. The pituitary gland is normal in size. There is no evidence for acute intracranial hemorrhage or acute cerebral, brainstem or cerebellar infarction. There are no extraaxial fluid collections or subdural hematomas. Flow voids are present within the major vessels indicating patency. The paranasal sinuses and mastoid air cells are clear. There is no abnormal enhancement within the brain.
1.A surgical defect is noted involving the right parietal lobe, specifically containing an encephalomalacic cavity lined with hypointensity, most prevalent on susceptibility technique, consistent with resection of a cerebral cavernous malformation. A small developmental venous anomaly is immediately posterior. 2.There are several other punctate lesions identified on susceptibility weighted imaging throughout the supratentorial and infratentorial brain, none of which demonstrate mass effect or perilesional edema, consistent with cerebral cavernous malformations.