Bone-building drug Zometa fights breast cancer spread, may lead to wider use, doctors say

A drug to prevent bone loss during breast cancer treatment also substantially cut the risk that the cancer would return, results that left doctors excited about a possible new way to fight the disease.

It is the first large study to affirm wider anti-cancer hopes for Zometa and other bone-building drugs called bisphosphonates. Zometa, made by Novartis AG, is used now for cancers that have already spread to the bone.

The new study involved 1,800 premenopausal women taking hormone treatments for early-stage breast cancer. Zometa cut by one-third the chances that cancer would recur _ in their bones or anywhere else.

"This is an important …