abstractadolescentsadultsassayaxillarybasebreastcancercarcinomaclinicalconservationdatadcisductalearlyelderlyendocrineespanolgenehormoneimpactlumpectomylymphmalemastectomynationalneoadjuvantnodeoutcomespatientspositiveradiotherapyratesreceptorrecommendationsscoresentinelsitustagestudytherapytreatedtrendsuseutilitywithoutyoung