Young women in England who later develop breast cancer are not being referred for early tests or preventive treatment because current guidelines used by GPs miss 95% of patients, research suggests. Breast cancer is the most common cancer worldwide. The researchers said the Nice criteria miss up to 95% of women aged under 50 with a higher-than-average risk of breast cancer, and 95% of women who go on to develop the disease within 10 years. “The current Nice criteria used in general practice are missing up to 95% of women under 50 who will go on to develop breast cancer. “However, the current evidence does not warrant a change to our existing familial breast cancer guideline at this time.