2. Ultrasound examination of bladder, prostate, kidney and ureter can be done to see if there is any problem of prostatic hypertrophy.
3. Examination of tumor markers, such as alpha-fetoprotein, can screen liver cancer; Neuron-specific enolase can screen lung cancer; Carcinoembryonic antigen can screen intestinal cancer; CA 19-9 can screen pancreatic cancer; CA724 can screen gastric cancer. .