Back in 2009, MCA, whose real name was Adam Yauch, revealed he was being treated for a cancerous parotid gland and a lymph node. He underwent surgery and radiation.

It's unclear if the cancer is connected to his death.

Yauch's death was initially reported by GlobalGrind.

Yauch co-founded the Grammy-winning Beastie Boys back in 1979. He leaves behind a wife and  daughter.

[TMZ]