According to the American Cancer Society says, although you may not notice some symptoms yourself, your doctor may discover that you have an enlarged gallbladder due to a blockage occurring in the duct (bile).
When the patient goes to see a doctor, during the imaging test, the doctor might discover a large lump under the right side of the rib cage. The most dangerous thing about this is that pancreatic cancer causes an enlarged liver, especially if cancer has spread to the liver.