Patient's question:
Supplementary question: How significant is the effect of mannitol and dexamethasone in reducing cerebral edema? Under normal circumstances, how many days are typically required to eliminate the edema?Doctor's answer:
Mannitol + dexamethasone is the first-line drug in neurology for improving symptoms of cerebral edema. Mannitol does not remove the water causing edema from the tumor itself but reduces the water in the brain tissue to alleviate the pressure of edema on the brain. Therefore, this drug only improves symptoms and is not a treatment for edema. To treat edema, one must address the tumor, either through surgical resection or radiotherapy, to reduce its size and necrosis, thereby decreasing edema.