Objective: To study the risk factors of postoperative hematoma after craniotomy and to reduce the occurrence of post-operative hematoma.Methods: The clinical data of 687 cases of intracranial neoplasms(meningioma

glioma

aneurysm) were analyzed retrospectivel.Results: Meningioma surgery carried a higher risk for postoperative hematoma than other intracranial neoplasms.The incidence of post-operative hematoma showed no significant difference between patients with glioma and these aneurysm.The incidence of post-operative hematoma in the elder was higher than that in the young or the middle-age with.The incidence of postoperative hematoma in patients with dysfunction coagulation was higher.Conclusions: The incidence of postoperative hematoma was higher for craniotomy in neurosurgery.The morbidity of postoperative hematoma in patients undergoing intracranial surgery was different regarding types of operation

age of patients and alteration of coagulation.