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

<div>Colonoscopic findings. (a) A polypoid-type tumor was seen in the sigmoid colon, which was initially assumed to be a sigmoid colon cancer. (b) An elevated lesion with redness was observed in the appendiceal orifice, where biopsies were not performed.</div>

Case Reports in Surgery

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Figure 1

Figure 1: Primary Appendiceal Adenocarcinoma Presenting with Hematochezia due to the Invading Tumor in the Sigmoid Colon 