This is not new herb to help cancer but the U.S. government has new information on it. Steve Jobs died from pancreatic cancer and people learned that this type of cancer is extremely hard to treat successfully. PubMed is part of the U.S. National Library of Medicine that is part of the National Institutes of Health (NIH). Here is what they say about graviola.
"The present study was aimed at evaluating the potential of a novel plant-derived product as a therapeutic agent for pancreatic cancer (PC)."
"Our experiments revealed that Graviola induced necrosis [death] of PC [pancreatic cancer] cells by inhibiting cellular metabolism."