Fig. 2

HER2 fluorescence in situ hybridization (FISH) classification by 2013 and 2018 American Society of Clinical Oncology (ASCO)/College of American Pathologists (CAP) guidelines. HER2 FISH results as categorized by 2013 ASCO/CAP guidelines (left) and reclassified by 2018 ASCO/CAP guidelines (right)