Sometimes a person does not know if she had cancer for years, but the success of cancer treatment will be high if caught early. Why cancer can go undetected for years?
Millions of people carry a tumor in his body for years without being detected. Researchers claim this is because the tumor cells did not enter into the bloodstream.
Scientists from Stanford University suggests it makes cancer cells go undetected for a decade or even longer to grow into a tumor up to the amount spent enough detected as biomarkers.
However, many biomarkers are created by the tumor cells are also produced naturally in a healthy body, so it took many years before it reaches concentrations high enough to cause concern.
It required a more sensitive test and find a more specific biomarker in diagnosing cancer early is the key to the success of treatment.
In the first study linking the size of the tumor to the level of biomarkers that are released into the bloodstream. Found to have ovarian tumors reached a size of 1.7 billion cells before the best test can detect that condition.
It is like a cube of size 2 cm in the body and takes about 10-13 years before the end of the most prominent biomarkers are located in a high enough level.
"It's really important for us to discover biomarkers that are made exclusively by tumor cells," said Prof. Sanjiv Gambhir, who led the study, as quoted by the Telegraph, Friday (11/18/2011).
Early detection is the key to defeating most types of cancer, but unfortunately about 80 percent of cancer patients come in an advanced stage conditions in which the treatment success rate of getting smaller.
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