When is a baby's head TOO big? As Paris Hilton's son is mocked by cruel online trolls, research shows one in 50 newborns have condition... and it can be deadly for one in 1,000 | Daily Mail Online

Two percent of babies are born with macrocephaly, a scary-sounding word that just means large head. Paris Hilton and her infant son were bullied for what some said was his too-large head.