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Mucocele of the appendix is a descriptive term that implies a dilated appendiceal lumen caused by abnormal accumulation of mucus. Mucocele is found in 0.2-0.3% of all appendectomy specimens. The male to female ratio is 1:4 and the average age at the time of diagnosis is over 50 years.Appendiceal mucocele can be histologically divided into three groups, focal or diffuse, mucosal hyperplasia without epithelial atypia, mucinous cystadenoma with some degree of epithelial atypia and mucinous cystadenocarcinoma.We report a case of benign mucocele of the appendix, which presented as persistent vomiting and lower abdominal pain.