Abstract:Objective:To study the urinary bladder inflammatory myofibroblastic tumor (IMT) of the clinical manifestations,imaging features,pathological features and treatment methods to improve the understanding of this disease. Methods:From 5 pathologically confirmed cases of bladder IMT,CT,MR manifestations and clinical data of patients were systematically analyzed,and the summary of the literatures about IMT were done. Results:Clinical manifestations were hematuria,dysuria and other symptoms;CT scan showed homogeneous or heterogeneous tumors. T1WI of MRI showed low signal,and T2WI image showed slightly higher signal. Substantial part of the mass enhanced constantly under enhanced CT scan. Under microscope observation,spindle cells proliferated accompanied by mixed inflammatory cells infiltration with myxoid background.The expressions of Vim,SMA and MSA were mostly positive by immunohistochemistry method,while expressions of Actin,HHF-35 and Des were partial positive,and expressions of Kertin,EmA and S-100 were negative. Total 5 patients underwent surgical resection eventually. Conclusion:The clinical symptoms of IMT were similar to bladder cancer, and the image of IMT has characteristic manifestations. The diagnosis mainly depends on the pathological and immunohistochemical methods,and the treatment based on partial cystectomy or transurethral resection.