P055. Are screening detected breast cancer populations homogeneous or is there a post code lottery?

Introduction: A post code lottery is believed by some to exist in cancer. One effect of this may be delays in presentation resulting in cancers with poorer prognosis. Screening detected breast cancers should avoid this because regardless of social background the majority are below the level of clinical detection, therefore they represent a vehicle for studying cancer population characteristics not influenced by external social factors, in theory they should be homogeneous. However in large metropolitan screening areas populations may be ethnically diverse which may cause heterogeneity.