Objective:To report the time trends of cancer incidence in urban Beijing from 1998 to 2007.Methods:All data were obtained from Beijing Cancer Registry from 1998-2007 in urban Beijing.Time trends of incidence rate of cancer were assessed by annual percentage change(APC) of age-standardized incidence rate(ASR) of world standard population during this 10-year period.Results:For all 156851 cancer cases combined,the incidence rate rose in both males and females,with an APC of 2.23% and 3.74%,respectively.The incidence rate of upper gastrointestinal cancers declined significantly,with an APC of-2.83% in esophageal cancer and-1.37% in male gastric cancer,while lower gastrointestinal cancer,such as colorectal cancer,increased with an APC of 4.08%.The rates of kidney and bladder cancer increased with an APC of 7.93% and 5.57%,respectively.For women,the APC continued to rise in breast cancer(4.98%),ovary cancer(6.16%),cervix uteri cancer(11.74%),corpus uteri cancer(6.96%) and thyroid gland cancer(13.39%).The rate of prostate cancer among men increased with an APC of 8.58%;the rate of lymphoma and leukemia increased with APC of 5.48% and 5.44%,respectively.Conclusion:Because of population aging and urban modernization,the cancer burden in Beijing has become more and more severe and similar to the western developed countries. Objective: To report the time trends of cancer incidence in urban Beijing from 1998 to 2007. Methods: All data were obtained from Beijing Cancer Registry from 1998-2007 in urban Beijing. Trends trends of incidence rates of cancer were assessed by annual percentage change ( APC of age-standardized incidence rate (ASR) of world standard population during this 10-year period. Results: For all 156851 cancer cases combined, the incidence rate rose in both males and females, with an APC of 2.23% and 3.74% , respectively. The incidence rate of upper gastrointestinal cancers declined significantly, with an APC of-2.83% in esophageal cancer and-1.37% in male gastric cancer, while lower gastrointestinal cancer, such as colorectal cancer, with an APC of 4.08%. The rates of kidney and bladder cancer increased with an APC of 7.93% and 5.57%, respectively. For women, the APC continued to rise in breast cancer (4.98%), ovary cancer (6.16%), cervix uteri cancer (11.74% , corpus uteri cancer (6.96%) and thyroid gland cance The rate of prostate cancer among men increased with an APC of 8.58%; the rate of lymphoma and leukemia increased with APC of 5.48% and 5.44%, respectively.Conclusion: Because of population aging and urban modernization, the cancer burden in Beijing has become more and more severe and similar to the western developed countries