With the advancement of medicine, many people now have regular cancer screenings to help detect cancerous lesions early. Many medical checkups will show the item of carcinoembryonic antigen, what if some people have a high level? Does a high level of carcinoembryonic antigen mean cancer? Clinical statistics show that 60% of patients with high carcinoembryonic antigen are likely to have malignant tumors, but if there are no symptoms at this time, it is likely that the tumor in your body is still very limited or very small, and can be cured by surgery and/or combined chemotherapy and other treatments. However, some patients such as chronic bronchitis, emphysema, gastric ulcer, atrophic gastritis, cholecystitis, etc. may have mildly elevated carcinoembryonic antigen. Patients with high carcinoembryonic antigen need to do the following: 1. It is better to take another blood test, and if another index is found to be elevated, then it is necessary to dig the ground and dig out the tumor. 2.The first step can be non-invasive examination, including fecal occult blood and ultrasound, including thyroid ultrasound, superficial lymph node examination, etc. Gynecological examination and breast physical examination are also very necessary. 3, If you have a history of smoking, then a CT lung examination is absolutely necessary. 4, Gastroscopy must be the next important examination. For women, a mammogram can be done before the gastroscopy, and of course an ultrasound of the breast can be done directly. 5.If all the above results are okay, then further colonoscopy can be considered next, because carcinoembryonic antigen is also found in colon cancer at the earliest.