Cerebral hemorrhage due to tumours is as one of the most common reasons of mortality especially in the age group of 15-30 years, hence timely diagnosis of the place and the type of bleeding is quite important. Since the bleeding occurs in 5 to 10 percent of brain tumors, the bleeding inside the brain tumor is more common in brain metastases. As in Iran no any comprehensive study has done in this regards, this study has been conducted. In a descriptive cross-sectional and retrospective study, the medical documents of under 30 years decedents with non-traumatic brain hemorrhage referred to the anatomy hall of Tehran forensics Organization were investigated. A checklist containing credible cases was designed; and the data related to personal information, clinical features and the epidemiology indexes were extracted from the available documents and records of patients. It was observed that over 10 years ago, 100 people under 30 years with non-traumatic brain hemorrhage have been referred to the anatomy hall of Kahrizak; out of which, 77 percent had no any history of drug use, 16 percent with the history of smoking, 4 percent had the history of using crystal and the rest 3 percent had the history of using the drug. In investigating the type of non-traumatic brain hemorrhage, 12 people had cerebellar hemorrhage, 3 people epidural, 11 people subdural, 18people cerebral ventricles, 29 people subarachnoid and 27 people had inside brain tissue hemorrhage that the most frequency of hemorrhage was related to subarachnoid. The obtained results of the present study demonstrate that non-traumatic brain hemorrhage in the persons with the history of drug abuse and women and men and the age groups has significant difference (P- < 0.05).
