Inflammatory myofibroblastic tumor (IMT) comprise of rare group of lesions characterized histologically by acute and chronic inflammatory cells with variable degree of fibrous stroma. Also called as Plasma cell granuloma or Inflammatory pseudotumor IMTs are most often seen in lung of young adults(2). The extrapulmonary sites are rare, and are found mostly in liver, spleen and small intestinal mesentery. Large bowel mesentery, rectum and appendenceal sites of IMTs are not often known(1,3,4). We present a case of IMT of sigmoid mesocolon in 27 years old young female patient whose symptoms improved after surgical resection of tumor.