Medical Definition of Tumor marker | 合法醫療器材資訊網

MedicalDefinitionofTumormarker,CEA...Tumormarker,CEA:Carcinoembryonicantigen(CEA)isaproteinfoundinmanytypesofcellsbutassociatedwith ...

Tumor marker, CEA: Carcinoembryonic antigen[1] (CEA) is a protein found in many types of cells but associated with tumors and the developing fetus.

CEA is tested in blood. The normal range[2] is <2.5 ng/ml in an adult non-smoker and <5.0 ng/ml in a smoker.

Benign[3] conditions that can increase CEA include smoking, infection, inflammatory bowel disease, pancreatitis[4], cirrhosis[5] of the liver, and some benign tumors (in the same organs which have cancers with increased CEA). Benign disease does not usually cause a CEA increase over 10 ng/ml.

The main use of CEA is as a tumor marker, especially with intestinal cancer. The most common cancers that elevate CEA are in the colon[6] and rectum[7]. Others: cancer of the pancreas, stomach, breast, lung, and certain types of thyroid[8] and ...