Byline: Jenny Hope Medical Correspondent
A BREAKTHROUGH drug gives women suffering an aggressive form of breast cancer an extra six months before the disease advances.
Women on a combination treatment of pertuzumab alongside the 'wonder' drug Herceptin lived on average for 18 months without their disease worsening, compared with 12 months for those not taking it.
Doctors are hailing the dual therapy as a 'quantum leap forward' that will change treatment in the same way Herceptin did five years ago.
A quarter of the 48,000 Britons diagnosed with breast cancer each year have the HER2 positive form, which is more aggressive.
When the …