In fact, antigen testing may eventually prove to be useful in the early diagnosis of blastomycosis and the most accurate test for diagnosis and therapeutic monitoring of this disease, with fewer potential complications than direct sampling of the respiratory tree.The role of antigen enzyme immunoassay in monitoring response to treatment must be explored further, but pilot results reported here are promising.dermatitidis antibodies in the sera of 76.1% and 17.4% of infected dogs, respectively.
Researchers continue to investigate markers to be used alone or in combination with CA 19-9 that may be more useful for screening for and detecting pancreatic cancer in the early stages, when it is most treatable.
CA 19-9 may be ordered when a person has been diagnosed with pancreatic cancer and/or has signs and symptoms that may indicate pancreatic cancer.
Since CA 19-9 is not specific for pancreatic cancer, it cannot be used by itself for screening or diagnosis.
NOTE: If undergoing medical tests makes you or someone you care for anxious, embarrassed, or even difficult to manage, you might consider reading one or more of the following articles: Coping with Test Pain, Discomfort, and Anxiety, Tips on Blood Testing, Tips to Help Children through Their Medical Tests, and Tips to Help the Elderly through Their Medical Tests.
(Read more on the Test tab of this article and in the Pancreatic Cancer article.) However, CA 19-9 may also be elevated in other cancers, conditions, and diseases such as: gallbladder and bile duct cancers (cholangiocarcinoma), colorectal cancer, gastric cancers, ovarian cancer, lung cancer, liver cancer, bile duct obstruction (e.g., gallstones), pancreatitis, cystic fibrosis, thyroid disease, and liver disease. What you Need to Know about Cancer of the Pancreas.
Small amounts of CA 19-9 are present in the blood of healthy people. Mosby's Diagnostic and Laboratory Test Reference 5th Edition: Mosby, Inc., Saint Louis, MO. All About Pancreatic Cancer, Pancreatic Cancer Detailed Guide. ASCO (1996 May 17, adopted, revision every 3 years). American Society for Clinical Oncologists, Clinical Practice Guidelines for the Use of Tumor Markers in Breast and Colorectal Cancer [On-line guidelines]. Another article, Follow That Sample, provides a glimpse at the collection and processing of a blood sample and throat culture. The CA 19-9 test may be used, along with other tests such as carcinoembryonic antigen (CEA), bilirubin, and/or a liver panel, to help evaluate and monitor a person who has been diagnosed with pancreatic cancer and is undergoing treatment. Diagnosis usually requires identifying organisms by cytologic or histologic examination of tissues or, more rarely, by culture of exudates or body fluids.In a recent study, transthoracic fine-needle aspiration or transtracheal wash successfully identified B.The results showed that enzyme-immunoassay-based B. dermatitidis antigen detection is more sensitive than either enzyme immunoassay or agar gel immunodiffusion antibody testing for diagnosing blastomycosis in dogs. dermatitidis antigen concentration decreased over time in both the serum and urine of infected dogs during treatment.