observation in a group of 722 patients subjected in 1993–1998 to appendectomy. It is an infrequent disease, its ratio in slides after appendectomy is about 0.1 %. Malignity of the appendix is usually not suspected before surgery and in rare instances during surgery. The diagnosis is usually made only after histological examinati- on. In treatment simple appendectomy is sufficient or more radical right-sided hemicolectomy can be perfor- med.

        Key words: appendix – adenocarcinoma – treatment