Objective To investigate the risk factors of aggravated cerebral edema after meningioma surgery. Methods Respectively analyze the clinical data of 187 patients received neurosurgery operation in our hospital from January 1

2016 to February 5

2018 and their postoperative aggravated cerebral edema

the related risk factors for brain edema after meningioma surgery was summarized. Results The incidence of aggravated cerebral edema in patients without preoperative edema(26.23%) was higher than that in patients with preoperative edema（13.8%）

the difference was not statistically significant

probably due to the small number of cases or other related factors. Multivariate analysis of all related factors found that preoperative edema was the influencing factor for the increase of brain edema after meningioma surgery(P=0.005).It was found by single factor analysis that tumor site was a risk factor for the aggravation of cerebral edema after meningioma surgery.Multivariate analysis and multiple rate comparisons revealed that the sagittal sinus falx area was an independent risk factor for the aggravation of cerebral edema after meningioma surgery. Conclusion The presence of peritumoral edema before surgery may be a protective factor for the postoperative brain edema.The incidence of postoperative cerebral edema was significantly higher in meningiomas located near the sagittal sinus falx than that of other sites.Therefore

meningiomas located near the sagittal sinus falx should be attached great importance.During the operation

the venous drainage should be protected

the perioperative management should be strengthened

and hormone and subsequent dehydration should be given timely to improve the prognosis of patients.