RT Journal Article SR Electronic T1 RB1: governor of the cell cycle in health and disease—a primer for the practising pathologist JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 435 OP 438 DO 10.1136/jcp-2024-209480 VO 77 IS 7 A1 Cordier, Fleur A1 Creytens, David YR 2024 UL http://jcp.bmj.com/content/77/7/435.abstract AB RB1 stands as the pioneering discovery in tumour-suppressor genes, marking a pivotal breakthrough in comprehending cancer development. This overview delves into the role of RB1 in both health and disease, exploring its association with the tumourigenesis of various cancers and a distinct subset of soft-tissue neoplasms. Additionally, we discuss the application of immunohistochemistry and fluorescence in situ hybridisation to detect RB1 alterations.