Well-differentiated tubular adenocarcinoma
(a) Endoscopic view of a flat-elevated lesion (26 × 22 mm in diameter) in the transverse colon after spraying with indigocarmine solution. The height of the tumor was extremely low in relation to the size of the entire lesion. This lesion did not show marked depression. (b) Histologic features showing a flat-elevated and smooth surface (H&E, original magnification ×12.5). (c) Well-differentiated adenocarcinoma associated with tubulovillous adenoma. Minute submucosal invasion surrounded by lymphoid stroma was observed (H&E, original magnification × 330). (d) Endoscopic view of a reddish depressed lesion (8 × 6 mm in diameter) in the descending colon adjacent to a flat-elevated lesion. After spraying with indigocarmine solution, the depression of this lesion was found to be clearly demarcated (e). (f) Histologic features showing endophytic growth (H&E, original magnification × 40). (g) Well-differentiated tubular adenocarcinoma showing minimal submucosal invasion (H&E, original magnification ×250). (From Sakashita et al. .)
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This image is taken from J Pasricha & GS Raju. Chapter 6, In Colonscopy, Advanced Digestive Endoscopy e-books. GastroHep.com.
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