Abstract

Since inflammatory myofibroblastic tumor was initially recognized in the lung, this tumor has been described in other extrapulmonary sites. In spite of relatively uniform histologic findings in various organs, a rarity in extrapulmonary sites and highly vascular characteristics frequently lead to a misdiagnosis in preoperative radiology and fine needle aspiration cytology. We present a case of inflammatory myofibro blastic tumor occurring in the mesentery of a 4-month-old girl. Fine needle aspira tion cytology smear disclosed characteristic spindle cells intermixed with prominent mature plasma cells and lymphocytes. According to the immunohistochemical staining, we recognized that the intervening spindle cells are myofibroblasts which have reactivity for the both actin and vimentin.

• Keywords: Inflammatory myofibroblastic tumor;Mesentery;Fine needle aspiration cytology