But negative result doesn't rule out disease, FDA warns

Guideline is prompted by concerns about mercury exposure

Jim Kelly Appears Free of Sinus Cancer: Doctor MLB Pitcher Curt Schilling Blames Mouth Cancer on Chewing Tobacco

Understand what's behind the fear

Study found children who got monthly infusions were less likely to suffer another attack

Most were satisfied with their decision, researchers noted

Rate of cell growth may be a key to diagnosis and treatment, an expert says

Study found it lowered risk even if they were obese

Decline of these neurons occurs with aging, Alzheimer's, researchers say

Cause seems related to inflammation of the arteries, researchers say