PMC10074612_01
Endoscopic view of the rectal polyp.
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Colonoscopy was performed under general anaesthesia, which was normal except for an 8 mm sessile rectal polyp, 6 cm from the anal verge, seen in Figure 1.
Elevation of the polyp with EMR solution.
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The polyp was elevated with endoscopic mucosal resection (EMR) solution and polypectomy was performed, as seen in Figures 2 and 3.
After endoscopic mucosal resection of the polyp.
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The polyp was elevated with endoscopic mucosal resection (EMR) solution and polypectomy was performed, as seen in Figures 2 and 3.
Polyp with dilated glands, marked inflammation, ulceration and granulation tissue
(100x).
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On low power (100x), sections from the resected polyps showed the typical picture of an inflammatory polyp, with dilated glands in a markedly inflamed stroma, extensive surface ulceration and granulation tissue (Figure 4).
Polyp with histiocytic infiltrate and mixed inflammation (200x).
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The high power view (200x), however, showed areas with histiocytic infiltrate and mixed inflammation composed predominantly of eosinophils, plasma cells and some neutrophils (Figure 5).
Histiocytic infiltrate with cells giving coffee bean-like appearance. Low mitotic
activity (400x).
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On further examination (400x), the histiocytic infiltrate showed cells having bland nuclei with grooved membranes imparting a coffee bean-like appearance, with low mitotic activity (Figure 6).
CD-Ia immunostain. Histiocytes show positive cytoplastic and membrane staining.
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S-100 immunohistochemical was also positive (Figure 7).