Figure 5
Findings on histology of gastric inflammatory myofibroblastic tumor (IMT). (a) Mucosal and transmural infiltration of mesenchymal and inflammatory cells with (b) focal mucoid change. (c) Characteristic loosely organized fascicles of myofibroblastic cells admixed with diffuse inflammatory infiltration and (d) focal mixed epithelioid and spindle cell presentation. Immunohistochemistry showed (e) sparse desmin immunoexpression and (f) diffuse strong cytoplasmic anaplastic lymphoma kinase (ALK) protein immunoexpression with some perinuclear intensification.