Imaging Analysis Of Inflammatory Myofibroblastic Tumor Of 15 Cases

Objective: Analyze the imaging features of different primary sites of inflammatory myofibroblastic tumor,to improve the knowledge of imaging features of inflammatory myofibroblastic tumor,and provide the basis for clinical diagnosis of inflammatory myofibroblastic tumor.Methods: Patients with inflammatory myofibroblastic tumor confirmed by pathology from November 2005 to 2015 in the First Affiliated Hospital of Guangxi Medical University were collected.The imaging data of these patients were analyzed retrospectively.Results: A total of 15 patients during the 10 year period with IMT in our hospital were enrolled,with a median age of 28 years(4-73 years).There were 9males and 6 females.Among them,there were 6 cases of lung IMT,2 cases of stomach,1 cases of colon,brain,breast,pericardium,liver,kidney and prostate IMT.There were 12 patient’s lesions diameter greater than 3cm。All of these lesions with an average diameter of 5.8cm.The imaging features are solitary(14/15),clear boundary(11/15)and density homogeneous(9/14)lesions.A few of them can be manifested as multiple,unclear boundaries,and sometimes closely resemble malignant tumors.Lung is the best Predilection site of IMT(6/15),and the lower left of lung is more common(3/6).The density of the lesions showed high density and soft tissue mass in the lung,and all of them showed low density or equal density soft tissue mass.The most common gastrointestinal IMT is the site of the stomach(2/3),often occurs in the greater curvature of the stomach side(2/2).All the patients underwent enhanced scan showed different degree of enhancement,but there was no regular pattern.MRI scans of these lesions showed long orequal T1 and T2 signals.Conclusion: IMT is a rare soft tissue tumor.Lung is the best Predilection site.IMT showed similar Imaging manifestations with other soft tissue tumors,with single,well-defined,homogeneous density.But the lesions performance were varied.sometimes,it is difficult to distinguish with malignant tumors or other soft tissue tumor,the diagnosis depends on the pathological diagnosis.