PMC5306986_01
The 4 mm firm nodule visualized in rectum.
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fig1
Boston Bowel Preparation Scale, a 1 cm serrated adenomatous polyp in the transverse colon that was removed with hot snare polypectomy, and a firm 4 mm nodule in the rectum that was removed with biopsy forceps (Figure 1). Biopsy of the rectal nodule revealed a granular cell tumor with positive periodic acid-Schiff (PAS) staining (Figure 2).
Rectal nodule biopsy (400x) revealing tumor cells arranged in sheets with small round-to-oval nuclei consistent with granular cell tumor on periodic acid-Schiff stain.
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fig2
Boston Bowel Preparation Scale, a 1 cm serrated adenomatous polyp in the transverse colon that was removed with hot snare polypectomy, and a firm 4 mm nodule in the rectum that was removed with biopsy forceps (Figure 1). Biopsy of the rectal nodule revealed a granular cell tumor with positive periodic acid-Schiff (PAS) staining (Figure 2).
Biopsy revealing positive immunohistochemical staining for S-100 protein.
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fig3
Immunohistochemical staining for S-100 protein was positive as well (Figure 3).