Cancer will spread quickly and damage many organs within a short period of time. Millions of people are suffering from various types of cancers and ingesting varieties of tablets and medicines every day. Patients who have suffered pancreatic, gall bladder or other types of abdominal cancers in the past have undergone blood examination regularly. Doctors will examine the blood report and find out if there is increase in CA 242 which is a tumor marker. It is worth to note that normal values will be between 0-20U/ml and increased levels of CA 242 are a sign of imminent danger. Cancer patients should not shy away from these types of important blood assessments and be cooperative with the physicians.