
To describe clinical, imaging, and histopathologic characteristics of inflammatory myofibroblastic tumor (IMT) of the urinary bladder and provide initial management and surveillance recommendations. We identified patients with IMT of the bladder treated at our facility from 1998‐2020. Categorical variables were analyzed with Chi‐square and Fisher’s exact tests and continuous variables with the Mann‐Whitney U test. Kaplan‐Meier analysis was performed for recurrence‐free survival. IMT was diagnosed in 35 patients with median follow‐up of 20 months (interquartile range [IQR] 11.5‐68.5 months). At initial diagnosis 86% were clinically organ‐confined, 9% locally‐advanced, and 5% metastatic. The rate of residual disease on restaging transurethral resection (TUR) was 92%. Of the 15 patients with organ‐confined disease managed initially with TUR, 5 patients (33%) recurred at a median 5 months from initial diagnosis (IQR 3.0‐5.5 months)...
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