A false-positive test result is one that appears to detect a
disease or condition when in fact it is not present. A false-positive test
result may thus suggest that a person has the disease or condition when he or
she does not.
For example, a false-positive pregnancy test result would be one
that appears to detect the substance (human chorionic gonadotropin) that would
confirm pregnancy, when in reality the woman is not pregnant.
Anne C. Poinier, MD - Internal Medicine & Martin J. Gabica, MD - Family Medicine