Not Every Bladder Mass Is Malignant: A Case of Inverted Urothelial Papilloma in a Young Adult

Abstract

Inverted Urothelial Papilloma (IUP) is an unusual variety of urothelial tumors that typically occurs in adults, with a predominance in males. The definitive diagnosis of IUP relies on histopathological examination, as the clinical presentation and endoscopic appearance are non-specific. The recommended treatment for IUP includes the complete transurethral resection, with some controversy regarding the need for cystoscopic follow-up. In this case, we present an atypical instance of IUP in a 21-year-old male patient, diagnosed with gross hematuria and irritative lower urinary tract symptoms. A clinical assessment revealed a 3.0 × 2.6 cm intravesical mass. The definitive diagnosis was confirmed histopathologically and further substantiated by immunohistochemistry, which demonstrated low expression of p53 and Ki-67, effectively ruling out malignancy. This case underscores the diagnostic challenges posed by bladder masses in young adults, emphasizing the necessity of integrating morphological and immunohistochemical findings to prevent overdiagnosis of urothelial carcinoma. The paper focuses on the diagnostic approach and management of this rare condition in the young male population.