Inflammatory myofibroblastic tumor(IMT) is composed of the cable shape myofibroblastic cells which constitute soft tissue tumors.IMT is mostly encountered in the lung,its occurrence in the head and neck is relatively rare.Herein,we reported 1 case of IMT after radiotherapy of nasopharyngeal carcinoma(NPC)in the nasopharynx.The clinical symptoms and nasal pharynx imaging findings of IMT are similar to the NPC.Thus,the pathological and immunohistochemistrical examinations maybe helpful to make a correct diagnosis.