Antígeno carcinoembrionario elevado con estudio digestivo normal, ¿qué hacer? Carcinoembryonic antigen raised with digestive normal study, what to do?

Carcinoembryonic antigen (CEA) is a complex intracellular glycoprotein produced by about 90% of colorectal cancers and it can be measured quantitatively in serum. It can also be elevated in other conditions such as gastric, pancreatic, lung, breast, medullary thyroid malignancies, as well as in non-neoplastic conditions such as cirrhosis, ulcerative colitis and pancreatitis.