Re: Cancer incidence and outcomes registries in an Australian contact: a systematic review Chong et al.'s review of Australian clinical registries prompts us to correct some inaccuracies regarding population-based cancer registries (PBCRs). 1 Their categorisation of registries as incidence or outcomes is misleading. We recommend using the Australian Commission on Safety and Quality in Health Care's classification, which distinguishes mandated PBCRs from clinical quality registries (CQRs). 2 This approach better recognises PBCRs' capacity to capture both incidence and outcomes.The assertion that PBC registries evolved independently is inaccurate. PBCRs are developed within a legal framework, maintaining consistent national data capture standards. Claims of extensive missing data are also incorrect. Over the last 20 years, PBCRs have made significant technological upgrades, resulting in very high data completeness by global standards. In Australia, only 2.3% of cancer cases are solely identified through death certificates, a widely accepted measure of data accuracy. 3 Expanding data collection to include imaging services, currently only available in Queensland, could make the data even more complete.Contrary to the authors' assertion, PBCRs do receive clinical input. Their datasets align with the World Health Organization Classification of Tumour reference guides, compiled by experts in pathology, clinical, and radiology fields. International groups like the American Joint Commission on Cancer provide guidance on prioritised data collection fields. 4 Artificial intelligence provides promise in enabling PBCRs to further expand their datasets based on these reference guides.This article underscores the need for PBCRs to demonstrate their value to the research community. The Victorian Cancer Registry (VCR) published 93 papers last year, nearly double the combined output of the top two CQRs (PCOR-ANZ and ABMTRR) over their lifetimes (https://www.cancervic.org.au/downloads/cec/cancer-invic/Cancer-in-Victoria-statistics-and-trends-2021.pdf). Collaborating with CQRs to capture data not easily obtainable from existing sources, especially patient-reported outcomes, holds promise. Efforts by both parties should focus on improving visibility and collaboration to advance cancer research in Australia.