Lancet OncologyAustralia & New Zealand Journal of Obstetrics & Gynaecology LANCET ONCOLOGYIn May 2008 Margaret McCredie, Charlotte Paul and others published a study in Lancet Oncology (Vol. 9 (5) which while acknowledging that the Unfortunate Experiment had been unethical, made ethical use of the data it had generated to extract as much information as possible about the long term efficacy of treating women with precancerous lesions.The study re-examined the original pathological specimens of women diagnosed with cervical intraepithelial neoplasia 3 (CIN3) at National Women’s Hospital between 1955 and 1974. (The diagnosis CIN3 has replaced the category of CIS and is somewhat more inclusive and precise that the older classification.). The…