alt Hacker NewsYou could repeat the test, perhaps on a more frequent interval to keep an eye on it. You could follow up with a more specific test, or do confirming blood work. In the meantime you can adjust your diet as a precaution, or get motivated to get in shape just in case.
There's plenty of room between "go under the knife" and "ignore altogether."
Or only consider it a positive once the confidence is high enough that false positives are not a problem anymore.
Getting a test good enough to still make it useful (detect enough of the true positives) would of course be a challenge, but the more data is available, the more feasible that might be.