Prostate cancer is an epithelial malignant tumor that occurs in the prostate. In 2004, WHO pointed out that prostate cancer included adenocarcinoma (adenocarcinoma), ductal adenocarcinoma, urothelial carcinoma, squamous cell carcinoma and adenosquamous carcinoma. Prostate adenocarcinoma accounts for more than 95% of them, therefore, prostate cancer usually refers to prostate adenocarcinoma. By 2012, the incidence of prostate cancer in China’s tumor registration area was 9.92 out of 10 million, while male malignancy incidence ranked sixth. Males under the age of 55 have a lower level of prostate cancer incidence, while it will gradually increases after 55 years old. Since incidence increased with age, the peak age is 70 to 80 years old. Males with family of advanced prostate cancer may get prostate cancer at an earlier age, of whom under 55 years old account for 43%.
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