Other advances in recent years include so-called targeted treatments that take aim at the underlying genetic mutations that fuel tumor growth drugs like Roche Holding AG's Zelboraf for melanoma.

WSJ: New Cancer Drugs Use Body's Own Defenses

CHICAGO An experimental drug being developed by Roche Holding AG delayed progression of disease and appeared to improve survival in women with a specific type of breast cancer in a study that illustrates the potential of an emerging new strategy for treating cancer.

WSJ: Roche Breast-Cancer Treatment Advances