VIM and inflammatory myofibroblastic tumor: Besides, previous literature have demonstrated that the spindle cells of IMT reacted immunohistochemically with vimentin, calponin, and SMA but were usually negative for desmin.13 Qiu et al14 reported that among the 18 IMT patients, the proportion of expression of calponin and SMA were 100 and 94%, respectively, whereas desmin expressed less frequently (7/21, 33%).