Urothelial Metaplasia in Prostate Needle Biopsy

Higher magnification of the previous image showing urothelial metaplasia in a prostate needle biopsy. Note the lack of cytologic atypia which is helpful in distinguishing urothelial metaplasia from high-grade PIN. There is no convincing proof that this is truly a metaplastic process; hence, the term urothelial metaplasia may not be entirely accurate.