Introduction:

Appendix tumors represent a fraction of the appendicular pathology, with different behavior depending on their histological pattern. This study has the objective to determine the prevalence of incidental appendiceal tumors, their frequency by histological type and distribution by age and sex at the Hospital General de México “Dr. Eduardo Liceaga”.

Material and methods:

A cohort study in which cecal appendix histological reports were checked in a period of 10 years, evaluating the following variables: sex, age, the diagnosis that determined surgery and histological result.

Results:

Of 6,242 reports of cecal appendix, 1.68% corresponded to neoplasm. Of these, 90.47% were benign (neuroma and adenoma) and 9.53% malignant (adenocarcinoma and carcinoid tumor). Of malignant neoplasms, the carcinoma represented 60%, with a predominance in women (5:1) and an average age of 25 years (SD ± 8.78). Adenocarcinoma represented 20%; all of them occurred in women with an average age of 36 years (SD ± 2.12). Mucinous adenocarcinoma represented 20%, with no sex preference and an average age of 47 years (SD ± 13.43). The age of onset for benign tumors was, on average, 47.9 years, and 32.1 years for malignant tumors (p = 0.001). Of benign neoplasms, 72% occurred in women, and 80% of the malignant ones (p = 0.900).

Conclusions:

The prevalence of incidental appendiceal tumors was 1.68 %; for benign neoplasms, 1.52 %, and 0.16% for malignant. The most common benign neoplasm was appendix neuroma (89.47%), followed by mucinous adenoma (9.47%), and serous adenoma (1.05%). Malignant neoplasms were carcinoid tumor (60%), adenocarcinoma (20%), and mucinous adenocarcinoma (20%). The age of onset for malignancies was the fourth decade of life, and for benign tumors, the fifth.

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