The world's top anti-cancer pharmaceutical company, Roche Holding AG, posted the biggest gains Zurich trading since February after new studies on its tumor drug Avastin proved it would be able to hold its own against rival Erbitux.

Roche rose 4.5 percent to $180.0575, its biggest gain since Feb. 25

The U.S. Food and Drug Administration approves Erbitux (cetuximab) for use in combination with radiation therapy to treat patients with squamous cell cancer of the head and neck.

The FDA says in its announcement Thursday that this is the first drug approved for head and neck cancer that has shown a survival benefit in this population

Im clone, famous for being synonymous with Martha Stewart, now has a new claim to fame. Researchers from the company have discovered a treatment for head and neck cancer with one of its previously approved drugs.

The U.S. Food and Drug Administration (FDA) has approved ERBITUX(R) (Cetuximab), for the treatment of squamous cell carcinoma of the head and neck and is the only treatment of its kind approved