Colon cancer or large adenomas are the major indications for right hemicolectomy, as it is the most appropriate oncologic resection. Though adenocarcinoma account for the great majority of colon cancers, other tumors such as carcinoids, lymphomas, and leiomyosarcomas may rarely occur. Right hemicolectomy is also the procedure of choice for appendiceal neoplasms (adenocarcinoma, appendiceal lymphoma) involving the cecum or mesentery  and appendiceal carcinoid tumors larger than 1.5 cm or smaller than 1 cm with extension into the mesoappendix . Benign conditions may also be treated by right hemicolectomy. These include Crohn's disease (although ileocecectomy is often sufficient), ischemia, trauma, right-sided diverticulitis, and volvulus.
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