Is the Andraka pancreatic cancer test real?
Basically, Andraka's method measures mesothelin. There's two key questions being asked about it (as it stands right now), falling into two categories:

1) There is some doubt as to the significance of serum mesothelin levels as a biomarker in pancreatic and biliary cancers. Some studies (e.g. Sharon et al (1)) suggest that there is no significant difference in levels - others (e.g. Hassan et al (2)) suggest that mesothelin may be a valid biomarker in some conditions but not others.

2) There are questions around the test itself. Andraka's work is promising and quite impressive. There are, however, some claims about it are being made that there's just not the evidence to support. I suspect that any fault for this lies with the journalists reporting on the story or PR people for various companies or institutions. The device may stand up to clinical trials and testing and be as revolutionary as it's claimed to be, but it does need to be fully tested.