PMC5329980_01
Endoscopic views of the polyps. (a) Colonoscopy revealed a 3.0-cm-long pedunculated polyp in the ascending colon (Case 1).
SJG-23-67-g001.jpg
PMC5329980_02_SJG-23-67-g001.jpg
F1
Colonoscopy revealed a 2.0-cm-long pedunculated polyp overlaid by hyperemic mucosa in the proximal sigmoid colon [Figure 1b].
Histological findings of resected specimens. (a) Case 1. Numerous dilated and irregularly thickened blood vessels are observed in the mucosa and submucosa (hematoxylin and eosin staining, magnification x10). (b) Case 1. At higher magnification, some vessels have thin collagenous walls of veins (short arrows), whereas others have muscular and elastic laminae of arteries (long arrows). There is no intervening capillary bed (hematoxylin and eosin staining, magnification x200). (c) Case 2. Tangles of abnormal vessels of various diameters are evident (hematoxylin and eosin staining, magnification x10)
SJG-23-67-g002.jpg
PMC5329980_02_SJG-23-67-g002.jpg
F2
Microscopic examination of the polyp demonstrated dilated blood vessels with thickened, hypertrophic walls [Figure 2c].
PMC5329980_02
Endoscopic views of the polyps. (a) Colonoscopy revealed a 3.0-cm-long pedunculated polyp in the ascending colon (Case 1).
SJG-23-67-g001.jpg
PMC5329980_02_SJG-23-67-g001.jpg
F1
Colonoscopy revealed a 2.0-cm-long pedunculated polyp overlaid by hyperemic mucosa in the proximal sigmoid colon [Figure 1b].
Histological findings of resected specimens. (a) Case 1. Numerous dilated and irregularly thickened blood vessels are observed in the mucosa and submucosa (hematoxylin and eosin staining, magnification x10). (b) Case 1. At higher magnification, some vessels have thin collagenous walls of veins (short arrows), whereas others have muscular and elastic laminae of arteries (long arrows). There is no intervening capillary bed (hematoxylin and eosin staining, magnification x200). (c) Case 2. Tangles of abnormal vessels of various diameters are evident (hematoxylin and eosin staining, magnification x10)
SJG-23-67-g002.jpg
PMC5329980_02_SJG-23-67-g002.jpg
F2
Microscopic examination of the polyp demonstrated dilated blood vessels with thickened, hypertrophic walls [Figure 2c].