Case Report

Gastric Schwannoma: A Tumor Must Be Included in Differential Diagnoses of Gastric Submucosal Tumors

Figure 3

Pathological imaging of the mass. (a) An exophytic tumor with size of 4 × 3 cm arising from the anterior wall of the lesser gastric curvature was observed. The exophytic part of the mass appeared off-white in color and rough with a concavo-convex surface; however, the margin of the mass on the gastric wall was clear. (b) Hematoxylin and eosin staining showed that the mass was composed of palisade-arranged spindle cells and peritumoral cuff-like lymphocytic infiltration (white arrow). (c) Immunohistochemical staining of sections showed that the gastric schwannoma was S-100-positive but was negative for (d) CD34, (e) CD117, (f) desmin, (g) DOG1, (h) Ki-67, and (i) SMA. ×100 magnification for all micrographs.
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