CA 50 can also be seen in benign hepatobiliary diseases, especially in jaundice cases. Therefore, this should be considered in order to obtain the most advantage of the marker. For other gastrointestinal cancers, CA 50 in combination with other previously defined markers may give additional information for the evaluation of some patients with colorectal, biliary, Pancreatic Cancer or gastric cancers.
No special preparation is needed for CA 50. Inform your doctor if you are on any medications or have any underlying medical conditions or allergies before undergoing CA 50. Your doctor depending on your condition will give specific instructions.