The CT findings of abdominal inflammatory myofibroblastic tumor

Objective:To investigate the CT findings of abdominal inflammatory myofibroblastic tumor(IMT).Methods:The CT findings and clinical data of 15 patients with inflammatory myofibroblastic tumor confirmed by pathological examination in abdomen were reviewed retrospectively.Results:Of all the patients with IMT,there were 10 tumors in liver,3 in spleen,1 in right kidney and transverse mesocolon respectively.CT findings:14 lesions showed slightly low or low-density and uneven on CT plain scanning,1 lesions showed isodensity.11 lesions showed round,similar round or irregularity bolus in shape,2 lesions showed petal-like or calabash respectively in liver.In 3 cases of spleen IMT,1 with intratumor hemorrhage,2 with calcification.13 cases showed mild enhanced or not enhanced in arterial phase,11 cases showed flocc,nodosity,ring and septatus enhanced in portal venous phase or in delayed phase,the lesions of 5 cases contracted or filled toward center in delayed phase,4 cases of liver IMT showed double-ring or three-ring sign,5 with surrounding edema,1 with mesenteritis and perirenal fascia thickening respectively.5 cases of liver IMT with cholangiectasis and calculus.All of the patients,14 were benign,1 with malignant in spleen.Conclusion:It is helpful to diagnose IMT by recognizing the CT feature of the disease combined with clinical data.