title: Use of conservative surgery for stage I breast cancer falls dramatically for women aged 80 and older.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000453:epidemiology / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D015994:Incidence; D008408:Mastectomy; D015995:Prevalence; D013557:Switzerland / Q000453:epidemiology