Seizures commonly seen due to the latter. Subdural hematoma Usually caused by torn bridging veins which traverse the subarachnoid space to reach the dural vessels which drain into the superior sagittal sinus. Often becomes clinically apparent within 48 hours of injury. They often herald a big stroke in the area where they occurred. Familial disease, part malformative, part neoplastic.
Vasogenic edema Occurs when the blood brain barrier is disrupted.
Often occurs focally surrounding areas of infarction, tumor or injury. Fluid is primarily intercellular. Additional features may include adrenal pheochromocytomas, renal cysts, renal cell carcinomas, pancreatic cysts and tumors, neoplasms of the epididymis. A complication of meningococcemia and some other Gram-negative sepsis. Seen in early phases of meningococcal meningitis.