A Rare Granular Cell Tumor with a Center Ulcer of the Rectum

Figure 2

Histopathologic features of a rectal granular cell tumor. (a) The tumor was seen in the submucosa (hematoxylin and eosin staining, ×12.5). (b) The tumor cells showed a polygonal or spindle-shaped cytoplasm with mild-to-moderate nuclear atypia and abundant eosinophilic granules (hematoxylin and eosin staining, ×200). (c) Immunohistopathology staining with periodic acid-Schiff was positive (original magnification, ×200). (d) Immunohistopathology staining for S-100 protein was positive (original magnification, ×200).

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