<prompt> Answer this question truthfullyWhat conditions can cause an elevation in serum α-fetoprotein AFP levels, and is there a mnemonic to remember them?  <response>: <reason> An elevation in serum α-fetoprotein AFP levels can be caused by hepatocellular carcinoma, endodermal sinus yolk sac tumor, mixed germ cell tumor, ataxia-telangiectasia, and neural tube defects. There is a mnemonic to remember them, which is HE-MAN is the alpha male. 