Theresa Ann Campo Pearson, an infant known to the public as "Baby Theresa," was born in Florida in 1992. Baby Theresa had anencephaly, one of the worst genetic disorders. Anencephalic infants are sometimes referred to as "babies without brains," – the cerebrum and the cerebellum – are missing, as is the top of the skull. The brain stem, however, is still there, and so the baby can still breathe and possess a heartbeat.