Researchers Find Common Denominator Linking All Cancers

> All cancers fall into just two categories, according to new research from scientists at Sinai Health, ... based on the presence or absence of a protein called the Yes-associated protein, or YAP.

I'm sure for those in the know there's a lot to glean from this but in my ignorance it just sounds really funny. Like saying all people fall into two categories: those named Bob and those who aren't!

> "Not only is YAP either off or on, but it has opposite pro- or anti-cancer effects in either context,” Bremner said. “Thus, YAPon cancers need YAP to grow and survive. In contrast, YAPoff cancers stop growing when we switch on YAP."

Huh, is it that they've narrowed down that YAP plays an important role in cancer growth or that all form of cancers rely on YAP. What was known before and what wasn't?