Which tumor marker is most commonly elevated in pancreatic cancer?

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Multiple Choice

Which tumor marker is most commonly elevated in pancreatic cancer?

Pancreatic cancer most reliably shows elevation in CA 19-9. This carbohydrate antigen is produced by pancreatic and biliary tract cells, and levels tend to rise when pancreatic adenocarcinoma is present. Clinically, CA 19-9 is useful to support diagnosis alongside imaging and symptoms, and it also helps monitor how well treatment is working and watch for recurrence. However, it’s not perfect. CA 19-9 can also rise in other conditions such as bile duct obstruction, cholestasis, pancreatitis, and liver diseases, so it’s not entirely specific to pancreatic cancer. Additionally, a small portion of people—those who are Lewis antigen negative—cannot produce CA 19-9 at all, so their levels may remain normal even with cancer. The other markers listed are tied more strongly to other cancers or are less sensitive for pancreatic cancer, so CA 19-9 is the best choice when considering which marker is most commonly elevated in this disease.

Pancreatic cancer most reliably shows elevation in CA 19-9. This carbohydrate antigen is produced by pancreatic and biliary tract cells, and levels tend to rise when pancreatic adenocarcinoma is present. Clinically, CA 19-9 is useful to support diagnosis alongside imaging and symptoms, and it also helps monitor how well treatment is working and watch for recurrence.

However, it’s not perfect. CA 19-9 can also rise in other conditions such as bile duct obstruction, cholestasis, pancreatitis, and liver diseases, so it’s not entirely specific to pancreatic cancer. Additionally, a small portion of people—those who are Lewis antigen negative—cannot produce CA 19-9 at all, so their levels may remain normal even with cancer.

The other markers listed are tied more strongly to other cancers or are less sensitive for pancreatic cancer, so CA 19-9 is the best choice when considering which marker is most commonly elevated in this disease.

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