Older patients with breast cancer still over-treated with radiotherapy – why?

A large proportion of surgeons in the United States and even a good percentage of radiotherapy oncologists still insist on treating women aged 70 years and older with adjuvant radiotherapy after they undergo lumpectomy for early-stage breast cancer. This is despite overwhelming evidence that adjuvant radiotherapy provides no survival benefit and very little protection against recurrence compared with no radiotherapy.
Medscape