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Like any elevated tumor marker, elevated AFP by itself is not diagnostic, only suggestive. Tumor markers are used primarily to monitor the result of a treatment (e.g. chemotherapy). If levels of AFP go down after treatment, the tumor is not growing. In the case of babies, after treatment AFP should go down faster than it would normally. A ...
Alpha-fetoprotein (AFP, α-fetoprotein; also sometimes called alpha-1-fetoprotein, alpha-fetoglobulin, or alpha fetal protein) is a protein [5] [6] that in humans is encoded by the AFP gene. [ 7 ] [ 8 ] The AFP gene is located on the q arm of chromosome 4 (4q13.3). [ 9 ]
AFP-L3% is the standard for quantifying the L3 isoform of AFP in serum of high risk chronic liver disease (CLD) patients. Studies have shown that AFP-L3% test results of more than 10% can be indicative of early HCC [ citation needed ] or early nonseminomatous germ cell tumor .
This is why AFP can be used alongside other tests as a tumor marker protein in adults. [12] AFP is a single polypeptide chain with a half-life of 4–5 days. The protein that is normally expressed in a fetus can also be expressed in mesodermal and endodermal tumors. AFP can have a lower concentration with fetal defects and is used as a marker ...
No screening test is wholly specific, and a high level of tumor marker can still be found in benign tumors. The only tumor marker currently used in screening is PSA (prostate-specific antigen). Diagnostics; Tumor markers alone can't be used for diagnostic purposes, due to lack of sensitivity and specificity. [5]
The usual markers for liver disease – aspartate aminotransferase, alanine aminotransferase and alkaline phosphatase – are often normal or only slightly elevated. FLC often does not produce alpha fetoprotein (AFP), a widely used marker for conventional hepatocellular carcinoma.