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The Korean Journal of Pathology 2008;42(3): 169-171.
Florid von Brunn Nests of the Urinary Bladder: A Case Report.
Han Seong Kim, Ji Eun Kwak, Sang Hwa Shim, Mee Joo, Sun Hee Chang, Je G Chi, In Rae Cho
1Department of Pathology, College of Medicine, Inje University, Goyang, Korea. hs-kim@ilsanpaik.ac.kr
2Department of Urology, College of Medicine, Inje University, Goyang, Korea.
Among benign proliferations of the urinary bladder, von Brunn nests and cystitis cystica et glandularis are common. Sometimes florid proliferation of von Brunn nests makes an intravesical mass, which mimics tumorous lesions. We report here on a case of florid von Brunn nests, occurred in the 34-year-old man with hematuria. Radiological and cystoscopic examinations reveal a polypoid-papillary lesion and transurethral resection was then performed. Pathologically, prominent proliferations of urothelial cell nests were found deep in the lamina propria. Neither significant cytologic atypia nor muscle invasion was noted. Florid von Brunn nests should be considered both clinically and pathologically in the differential diagnosis of a intravesical mass.
Key Words: Urinary bladder; Florid; Cystitis