Clin Endosc.  2023 May;56(3):388-390. 10.5946/ce.2023.049.

A focally flat-elevated lesion in distal transverse colon resembling a subepithelial tumor

• Lee SH
• Kang SB

• KMID: 2542468
• DOI: http://doi.org/10.5946/ce.2023.049

Figure

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  Fig. 1. Abdominopelvic computed tomography with axial view (A) and coronal view (B) revealed wall thickening of the distal transverse colon (white arrows) and infiltration along the mesentery around the distal transverse colon.

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  Fig. 2. Colonoscopy. A flat, elevated lesion was observed in the distal transverse colon on colonoscopy (A), and an abnormal vasculature was observed on narrow-band imaging (B).

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  Fig. 3. Histological findings. (A) Atypical lymphoid cell proliferation was seen in the deep mucosa and submucosa, and many lymphoepithelial lesions were observed (hematoxylin and eosin stain, ×100). (B, C) Lymphoid cells was positive for CD20 and negative for CD3 (immunohistochemical stain, x100). (D) Ki-67 labeling index was 7% (Ki-67 stain, x200).

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