A Rare Case of Inflammatory Myofibroblastoma of Diaphragm

Inflammatory myofibroblastoma is a distinctive pseudosarcomatous lesion that occurs primarily in the viscera and soft tissue of children and young adults. It is composed of myofibroblastic spindle cells accompanied by an inflammatory infiltrate of plasma cells, lymphocytes, and eosinophils. We report a 41-year-old man who presented with progressive dyspnea and pain in the right hypochondrium for 6 months. USG abdomen revealed a well-defined hypoechoic rounded mass in the subdiaphragmatic region. CT thorax and abdomen revealed a large hypodense mass in posterosuperior aspect of the right lobe of liver, right pleural effusion and basal consolidation of the right lung. Right thoracotomy was performed. The tumor mass was arising from the right side of diaphragm. Total surgical excision was done. On histomorphology and immunohistochemical analysis, a diagnosis of inflammatory myofibroblastoma was done. Following excision the patient was completely relieved of dyspnea and pain. There was no recurrence on follow-up for 2 years.