ABSTRACT
Purpose To study the clinicopathologic features of inflammatory myofibroblastic tumor (IMT) of long bone.Methods HE and immunohistochemistry of EnVision two-step were used to observe the clinical,radiological,histological and immunophenotype features of IMT of bone.The literatures were reviewed.Results 4 cases of IMT of bone were respectively located in the tibia (2 cases) and femur (2 cases).Histologically,the lesions were characterized by collagen-rich and spindled to plump myofibroblast-like cells and a variable admixture of inflammatory cells.Immunohistochemical study showed that the vimentin,SMA,actin,H-caldesmon and CD34 were positive.Conclusion The IMT is a rare and locally aggressive tumor.The diagnosis should combine the histological characters with immunohistochemical results and should be differentiated from the other tumors and tumor-like lesions.