Inverted Papilloma of the Bladder and Their Variants versus Inverted Growth Patterns of Cancer
نویسنده
چکیده
Inverted papilloma of the bladder is thought to be benign, but some urothelial carcinomas show a prominent inverted growth pattern which may pose a diagnostic dilemma. A recent meta-analysis of 322 cases reported with respect to inverted papilloma of the lower urinary tract identified a recurrence rate of 3.85%. Moreover, 1.55%, 5.90% and 1.54% were associated with previous, simultaneous and subsequent urothelial cell carcinoma, respectively (1). These findings together with the known potential for misinterpretation of urothelial carcinoma with endophytic growth as inverted papilloma emphasizes the need of an appropriated approach to differential diagnosis of endophytic lesions of the bladder.
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