SMN1 and inflammatory myofibroblastic tumor: The marker is relatively specific for IMT among the series of fibroblastic-myofibroblastic tumors and other mesenchymal mimics of IMT, while smooth muscle markers (including Desmin, h-caldesmon, and SMA), CD34, and MDM2 are expressed variably, which are not distinct for IMTs [7, 11, 12].