Waking up on her day off, Sara Piro looked in the mirror to find that everything was normal, except for the fact that she was yellow. Sara had jaundice, a condition in which the skin turns yellow because of a high level of bilirubin, a yellow-orange bile pigment. For the last six months, she had been going to a local emergency room with extreme pain. The cause wasn’t further investigated until she showed up again with yellow skin.