CT features of inflammatory myofibroblastic tumor in children

Objective To investigate the CT features of inflammatory myofibroblastic tumor in children. Methods Eighteen patients with inflammatory myofibroblastic tumor proven by surgery and pathology were examined with plain and contrast medium enhancement CT scan. Results Of 18 cases,16 had isolated lesions located at lung (n =4), mesentery (n =3), kidney (n =2) and trachea (n = 1 ),left main bronchus ( n = 1 ), right thoracic cavity ( n = 1 ), peritoneum cavity ( n = 1 ), pancreas ( n = 1 ),left thigh ( n = 1 ), prostate ( n = 1 ), superclvicle soft t tissue ( n = 1 ) , bladder ( n = 1 ). The other 2 cases were with multiple lesions on omentum and mesentery, and in intraperitoneal and side of split of right hepatic lobe, respectively. The CT findings of 18 cases included 16 solid mass with calcifications in 3 of them, and 2 solid-cystic mass. After contrast enhancement, moderate or marked homogeneous or heterogeneous enhancement were shown in all the solid parts of tumor on dynamic CT. Mass can compress surround great vessel and tube-like structure. On pathological examination, the tumor was mainly composed of spindleshaped fibrous cells and inflammatory cells, and the immunohistochemically staining for SMA was observed positively. Conclusion CT can provide specific information for diagnosis of inflammatory myofibroblastic tumor, yet definite diagnosis relies on pathology. Key words: Neoplasm;  Muscle tissue;  Tomography,X-ray computed