[Primary malignant appendiceal tumors].

Primary appendicular malignant tumors are rarely met with, and account for 0.5 per cent of all intestinal tumors. Of them 99 per cent are assigned to four types of neoplasms--carcinoid tumors, mucinous cystadenocarcinoma, adenocarcinoma and adenocarcinoid. These tumors are discussed under a separate heading owing to their location, clinical manifestation and characteristic features of the therapeutic approach. All patients presenting malignant neoplasms should be mandatorily subjected to follow-up study, insofar as 15-20 per cent of them develop secondary malignant processes located in the gastrointestinal tract mainly. Appendectomy is a sufficient in size operation done in carcinoids up to 1.0 cm in diameter; right hemicolectomy is indicated in carcinoids exceeding 2 cm in diameter; in adenocarcinoma measuring 1 to 2.0 cm, the extensiveness of intervention depends on the presence of infiltration into the mesoappendix. In mucinous cystadenocarcinoma right hemicolectomy is the operation of choice. In adenocarcinoma and adenocarcinoid tumor right hemicolectomy is proposed as a radical intervention, in conjunction with oophorectomy in menopausal patients.