The authors are describing a case of a patient with the diagnosis of the appendicular cancer. The 66-year-old patient underwent appendectomy because of signs of acute appendicitis, and than in the next step right-sided hemicolectomy because of histological finding of the mucinous adenocarcinoma of the appendix. Mucinous adenocarcinoma is the most common type of appendicular cancer, none the less this diagnosis is very rare.
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