“A drug used to treat advanced breast cancer has had what appears to be unprecedented success in prolonging lives in a clinical trial, researchers reported on Sunday.
“Patients who received the drug — Perjeta, from the Swiss drug maker Roche — had a median survival time nearly 16 months longer than those in the control group.
“That is the longest amount of time for a drug used as an initial treatment for metastatic breast cancer, the researchers said, and it may be one of the longest for the treatment of any cancer.
“Most cancer drugs prolong survival in patients with metastatic disease for a few months at most. Metastasis means the cancer has spread to other parts of the body.
“ ‘We’ve never seen anything like this before,’ said Dr. Sandra M. Swain of the MedStar Washington Hospital Center in Washington, the lead author of the study. ‘It’s really unprecedented to have this survival benefit.’ ”