History20th centuryUnited Stateshigh confidence

The radical mastectomy developed by William Halsted was still used to treat breast cancer in the 1970s.

Notes on verification

Well-corroborated by multiple independent medical history sources and reflects documented medical practice timeline; consistent with NSABP trial history. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.925 clusters=2 claim_tier=notable | framework convergence=partial (upstreams: NSABP (National Surgical Adjuvant Breast and Bowel Project) clinical trials, medical history literature on breast cancer surgery) — publishers independent, evidence may not be | kind=empirical eligibility=high (extractor: empirical/medium)]

Sources