I know that in my area, they generally will not do Pap smears on a woman over the age of 70 if she has had no evidence of abnormal smears for at least the last 3 years or so. (My understanding of the rationale is that cervical cancer in women this age is relatively uncommon and it is thought that the risks and costs of overscreening outweigh the benefits for women in this age group.) I do not know if the same applies to breast cancer screening.
Can You Name 5 More Songs? (Number 3)
Survey on British Women's Perspectives on Politics and Social Issues


) and I have found it depends on the radiographer, not the size. 