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Emeritus Professor Brett Delahunt holds the title of Professor of Pathology and Molecular Medicine at the University of Otago's Wellington School of Medicine and Health Sciences, within the Department of Pathology and Molecular Medicine. He obtained his BSc (Hons) from Victoria University of Wellington in 1972 and his BMedSc in 1976 and MB ChB in 1978 from the University of Otago. Beginning his tenure at the Wellington campus in February 1980, he contributed over 40 years to the department, including 25 years as Professor. Delahunt is renowned for his expertise in urological pathology. He co-developed the International Society of Urological Pathology (ISUP) grading system for clear cell renal cell carcinoma, published in The American Journal of Surgical Pathology in 2013 and incorporated into the World Health Organization classification of renal tumours. He has also advanced grading methodologies for prostate cancer diagnosis and prognostication through extensive research collaborations.
Professor Delahunt has authored more than 500 peer-reviewed publications, amassing thousands of citations and significantly impacting cancer pathology worldwide. Key achievements include service on the World Health Organization Expert Panel on Urological Tumours since 1989, presidency of the New Zealand Society of Pathologists for 10 years, and leadership in resurrecting the society. His contributions earned him the Officer of the New Zealand Order of Merit (ONZM) in 2004 for services to pathology, Knight of the Order of St John (KStJ) in 1995, Fellowship of the Royal Society of New Zealand (FRSNZ) in 2012, Hercus Medal in 2018, Gold Medal from the New Zealand Society of Pathologists in 2021 recognizing 41 years of service, and the Royal College of Pathologists of Australasia Pathology Article of the Year award in 2022 for 'Percentage grade 4 tumour predicts outcome for prostate adenocarcinoma in needle biopsies from patients with advanced disease: 10-year data from the TROG 03.04 RADAR trial'. Recent appointments include Foreign Adjunct Professor at the Karolinska Institutet in Sweden and Distinguished Research Fellow at the Malaghan Institute of Medical Research. He serves as National Patron of the Prostate Cancer Foundation of New Zealand.

