A major component of health screening involves cancer screening.
Addition to general screening tests recommended for everyone, certain tests may be useful for some predisposed group of people. One may have risk factors to certain disease base on a positive family history, social history such as smoking or alcohol, or other pre-existing medical conditions.
While health screening should be comprehensive, it is important to target it base on personal health risks factors, needs and concerns. You may wish to discuss with your doctor before proceeding with various investigations during health screening.