A stye is caused by infection of a gland at the base of an eyelash. It generally causes a lump at the margin of the eyelid, that is inflamed and often painful. Styes are usually caused by ...

The National Prion Disease Pathology Surveillance Center (NPDPSC) is the only Center of its kind in the U.S., which coordinates autopsies and neuropathologic examinations of suspected prion disease ...