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Carbohydrate antigen 19-9 (CA19-9), also known as sialyl-Lewis A, is a tetrasaccharide which is usually attached to O-glycans on the surface of cells. It is known to play a role in cell-to-cell recognition processes. It is also a tumor marker used primarily in the management of pancreatic cancer. [1]
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CA19-9 (carbohydrate antigen 19.9) is a tumor marker that is frequently elevated in pancreatic cancer. However, it lacks sensitivity and specificity, not least because 5% of people lack the Lewis (a) antigen and cannot produce CA19-9. It has a sensitivity of 80% and specificity of 73% in detecting pancreatic adenocarcinoma, and is used for ...
Tumor markers may be used for the following purposes: Monitoring the malignancy; When a malignant tumor is found by the presence of a tumor marker, the level of marker found in the body can be monitored to determine the state of the tumor and how it responds to treatment.
CA 242 is a tumor marker for sialylated Lewis carbohydrates associated with adenocarcinomas and e-selectin-mediated metastatic risk. [1] [2] [3] It is commonly tested along with CEA, CA19-9, and CA242 for detecting pancreatic cancer. [4]
Serum levels of carcinoembryonic antigen (CEA) and CA19-9 are often elevated, but are not sensitive or specific enough to be used as a general screening tool. They may be useful in conjunction with imaging methods in supporting a suspected diagnosis of cholangiocarcinoma.
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230099 Ensembl ENSG00000107159 ENSMUSG00000028463 UniProt Q16790 Q8VHB5 RefSeq (mRNA) NM_001216 NM_139305 RefSeq (protein) NP_001207 NP_647466 Location (UCSC) Chr 9: 35.67 – 35.68 Mb Chr 4: 43.51 – 43.51 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Carbonic anhydrase IX (CA9/CA IX) is an enzyme that in humans is encoded by the CA9 gene. It is one of the 14 carbonic anhydrase ...