CA19-9 Antigen

**Semantic type:** Immunologic Factor|Organic Chemical|Pharmacologic Substance

**Definition:** CA 19-9 is a fucosylated glycosphingolipid carbohydrate antigen that is soluble and is adsorbed to erythrocytes and to many adenocarcinomas of the digestive tract, especially pancreatic tumors. By structure CA 19-9 is related to the Lewis blood group antigens.

**Synonyms:** - CA-19-9 - CA19-9 - CA19-9 - Cancer Antigen 19-9 - Carbohydrate Antigen 19-9 - SIALYL LEWIS A - SLeA - Sialyl Le(a) Antigen - Sialyl LeA - Sialyl LewisA - Sialyl-Lewis A - Sialylated Lewis (a) Antigen - Sialylated Lewis a Antigen