<prompt> Answer this question truthfullyWhat are the conditions in which α-fetoprotein AFP is a serum tumor marker elevated, and what is the mnemonic to remember them?  <response>: <reason> The conditions in which α-fetoprotein AFP is a serum tumor marker elevated are hepatocellular carcinoma, endodermal sinus yolk sac tumor, mixed germ cell tumor, ataxia-telangiectasia, and neural tube defects. The mnemonic to remember them is HE-MAN is the alpha male. 