SERPINA1 and gastrointestinal stromal tumor: The immunohistochemical evaluation showed diffusely positive expression of vimentin; alpha 1-antichymotrypsin (α1ACT) and alpha 1-antitrypsin (α1AT); and focally positive expression of desmin, α-smooth muscle actin (α-SMA), glypican-3, and discovered on the gastrointestinal stromal tumor-1 (DOG-1) and negative expression for CAM 5.2, AE1/AE3, Hepatocyte Paraffin-1, S-100, HMB45, CD34, and c-kit (Fig. 5).