Adenocarcinoma of the vermiform appendix.

Primary carcinoma of the appendix, though rare, occurs often enough to warrant its inclusion in diagnostic possibilities when the symptoms of acute appendicitis, without leukocytosis, are present in geriatric patients. A case of mucinous adenocarcinoma of the appendix in an 88-year-old white woman is presented. The substantial relief following right hemicolectomy has persisted for several months of follow-up.