Flat urothelial lesions of the urinary bladder: Who is in who is out?
Flat lesions of the urothelium with histologic features that falls short of the threshold for urothelial carcinoma in situ (CIS) remains a challenging problem in diagnostic surgical pathology. Among these are flat urothelial hyperplasia, urothelial dysplasia, and atypia of unknown significance; lesions that have struggled under evolving classifications, changing criteria, and limited clinical actionability, all confounded by the recognized lack of diagnostic reproducibility.
In this episode of ModPath Chat, Dr. Gladell Paner discusses with the host his recently published “Controversies in Pathology” article in Modern Pathology on the pros and cons of keeping the previous terminology of this group of lesions.
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