I can't get past the adblocker spam, but I'm going to guess this woman had APL (acute promyelocytic leukemia, caused almost exclusively by a very specific chromosomal translocation) and the doctors didn't think to look for Auer rods and thus did not try FISHing for the translocation. APL is deadly (5% survival) if treated incorrectly but curable (95%) if treated correctly. However, something or other about that diffe…
It would definitely be impressive, but it doesn't mean much without knowing how many times it mis-diagnosed. IBM is very good at PR and Watson is milked for every little bit so I'm always a bit suspicious about it in triumphant announcements like these. After all, winning the lottery is a lot less impressive if you've bought a few million tickets and this article says absolutely nothing about any kind of controls or…
FWIW, here's Lukas' writeup of his experience.