Anatomic pathology selected abstracts
July 2024—The 2022 International Society of Urological Pathology consensus conference on urinary bladder cancer working group two was tasked with providing evidence-based proposals on applying grading to noninvasive urothelial carcinoma with mixed grades; invasive urothelial carcinoma, including subtypes and divergent differentiations; and pure non-urothelial carcinomas. Studies suggested that predominantly low-grade noninvasive papillary urothelial carcinoma with focal high-grade component has an intermediate outcome between low- and high-grade tumors. However, no consensus was reached on how to define a focal high-grade component.