A case of inflammatory myofibroblastic tumor (imt) developed under diaphragm in adult

Abstract

We report a case of inflammatory myofibroblastic tumor (IMT) developed under the diaphragm in the adult. The patient was a male aged 45 years. He visited with a chief complaint of left hypochondrium pain to our department. A tumor having central abscess in left diaphragm and an extrahepatic regional border and having a slightly unclear margin was showed by CT. This was diagnosed as the tumor originated from the left diaphragm with hepatic infiltration or originated from the liver with diaphragmatic infiltration. Removal of parts of the left diaphragm, left lateral segment of the liner and pericardium were conducted. The tumor was grossly present between the liver and the diaphragm, and its size was 8.0 × 7.0 × 3.0 cm. The tumor was white on its cut surface, with the abscess in its central area. A granuloma-like lesion with necrosis was histologically observed between the liver and the diaphragm, and atypical spindle-shaped cells proliferated in its circumference. The tumor expanded over the diaphragm and the liver and progressed to the pericardium. The tumor was diagnosed as IMT by its immunohistochemical findings. This was IMT developed between the diaphragm and left hepatic lobe in the adult and was a rare case.