Royal college defends labs' restrictions on GP cancer tests Pathologists have hit back at GPs' claims that labs have refused to provide checks for ovarian cancer and warned that CA125 blood tests must not be used for screening. by Stephen Robinson Sign in to continue Sign In Email address Password Stay signed in Trouble signing in? Reset password: Click here Need help? Email us Register FREE Limited free articles a month Free email bulletins Register Now Register Now Take a 30-day trial Join MIMS now and pay nothing for the first 30 days Join GPOnline now and pay nothing for the first 30 days Sign Up Sign Up