PMC3161636_01
This picture shows a macroscopic view of a colon diverticulum. The fatty subserosal tissue contains some fibrous strands, which microscopically showed adenocarcinoma (arrow).
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On transverse slides multiple diverticula were seen and a number of fibrous strands within the fatty subserosal tissue (Fig. 1).
Microscopic examination of the resected specimen: a submucosal adenocarcinoma of the intestinal type, moderately differentiated, within the wall of a diverticulum A) In this section (HE-stained) the tumor cell cloths are marked by an arrow. B) A serial section shows Cytokeratin 20 positive staining (marker for adenocarcinoma).
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Microscopic examination of the resected specimen revealed an inflamed diverticulum with a moderately differentiated submucosal adenocarcinoma of the intestinal type, in its wall (Fig. 2).