This comes from the work of Carlo Maley and his colleagues working on Barrett's Esophagus.

NPR: Startling New Evidence Cancer Is Contagious

Another heretical-sounding idea was put forth by Carlo Maley, a cancer specialist and associate professor at U.C.

FORBES: How Giving Children Foods They Are Allergic To Can Cure Them, And Other Provocative Approaches In Evolutionary Medicine

And I decided that it seemed to be possibly connected with some other research I had heard about in cancer more recently in Philadelphia, done by a fellow, Carlo Maley, on the evolution of cancer in humans.

NPR: Startling New Evidence Cancer Is Contagious