Purpose To investigate the clinicopathologic features,diagnosis and differential diagnosis of primary gastric inflammatory myofibroblastic tumor( IMT). Methods Four cases of gastric IMTs were studied by clinicopathologic analysis,immunohistochemistry and in situ hybridization,and the related literature was reviewed. Results In four cases there are two males and two females,age range from 21 to 51 years old,and tumor size ranged from 1. 5 to 6. 5 cm in the greatest dimension. Histologically,these tumors were...