The drug, sold under the brand name Nexavar, is approved in the United States and dozens of other countries to treat advanced kidney cancer. It is marketed by Bayer Pharmaceuticals Corp. and Onyx Pharmaceuticals Inc., which funded the liver cancer study. They hope to receive approval for liver cancer use from US and foreign regulators.

Llovet has done consulting for the sponsors.

Liver cancer is diagnosed in about 19,000 Americans annually but is much more common elsewhere and is the fifth most common cancer globally. Risk factors include chronic liver infections and some forms of hepatitis.

Liver cancer doesn't respond well to conventional chemotherapy and is often diagnosed too late for surgery to be an option. Many patients die within a year of diagnosis.

Robert Throckmorton, a 73-year-old attorney in Orange County, Calif., said his doctor told him "You better get your affairs in order" after he was diagnosed with inoperable liver cancer last August.

But then the doctor offered sorafenib off-label, and Throckmorton readily agreed. He did not take part in the study.

After nine months on the drug, Throckmorton said his cancer shows no sign of progression and he has no significant side effects. He said he walks three miles six days a week to stay active and feels fine.

Instead of thinking about wills and funerals, Throckmorton is looking forward to get-togethers with his eight children and 18 grandchildren, and even a possible church trip to Uruguay with his wife.

"I have good energy," Throckmorton said. "We are optimistic."

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