Primary Appendiceal Adenocarcinoma Presenting with Hematochezia due to the Invading Tumor in the Sigmoid Colon

Figure 4

Microscopic findings of the resected specimen. (a) The specimen was cut along a red dotted line which included the appendiceal tumor and the invaded sigmoid colon. (b) A cross-section of the cut specimen. The area surrounded by a red box was examined microscopically. (c) A microscopic view. The tumor (indicated by an asterisk) had come into contact with the inner side of the sigmoid colon. The muscularis propria and the mucosa of the sigmoid colon are indicated by an arrowhead and an arrow, respectively. (d) A higher magnification view showing that the tumor was a well-differentiated tubular adenocarcinoma.

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