If there is chronic inflammation in the body, such as chronic pancreatitis, CA199 may also be slightly higher, which does not necessarily mean that there is a malignant tumor in the body. However, if CA199 is significantly higher than normal, it will indicate the presence of malignant tumor in the body. If there is bowel cancer, it will also be significantly higher, but a significantly higher CA199 value does not necessarily mean that there is bowel cancer. CA199 may also be significantly elevated if there are malignant tumors such as pancreatic cancer, gallbladder cancer, bile duct cancer, and stomach cancer. Therefore, if a significantly elevated CA199 value is found, other tests are needed to identify the site of the primary tumor and to develop a treatment plan accordingly.