The difference between prostate cancer and bladder cancer: 1. The site of onset is different, prostate cancer occurs inside the prostate gland and is located in the posterior urethra, while bladder cancer occurs inside the bladder and is located in the small abdomen. 2. The symptoms are different, prostate cancer in the early stage is mainly due to the enlargement of the prostate gland pressing on the urethra, so there will be symptoms such as difficulty in urination and effort to urinate, and later pain and bleeding can occur. However, bladder cancer does not cause pressure on the urethra, so it usually does not cause difficulty in urination or straining to urinate, and the bleeding of bladder cancer is relatively early, and painless hematuria can appear very early. 3. The cancer can occur in all parts of the urinary tract. In contrast, prostate cancer is an adenocarcinoma that occurs in the alveolar cells of the prostate gland and does not usually lead to the development of tumors in the urinary tract epithelium, so metastases to the bladder, ureter, and renal pelvis rarely occur in prostate cancer.