Abstract: Objective To analyze the causes of death in cancer patients. Methods In collection of 6316 cancer cases coming to the emergency clinic, the causes of death were analyzed in 124 cases. Results In the 124 cases, 25.8%（32/124）was due to the cancer growth itself while 74.2%（92/124）was resulted from complications. Most of the deaths were seen in patients with cancer of the lung, stomach and esophageal cancer. Cachexia，infection，respiratory failure, hemorrhages and shock were the causes of death frequently seen. The first two causes accounted for 25.8% and 22.6% of the total deaths in this series, respectively. Conclusion Complications are the major causes of death. The importance of their proper prevention needs to be emphasized.

Key words: Neoplasm, Emergency, Causes of death