Cancer Antigen 19-9 short for (CA19-9) is a tumor marker used to monitor the treatment mainly of pancreatic cancer. However, it may be used for stomach and thyroid cancer.
CA 19-9 is commonly ordered:
• To monitor for pancreatic cancer recurrence.
• To help differentiate between cancer of the pancreas and other conditions, such as pancreatitis.
• Monitoring the effectiveness of treatment for someone who has been diagnosed with pancreatic cancer.
• Weight loss
• Abdominal pain
• Loss of appetite