What is the incidence of carcinoid tumors in appendectomy specimens (performed for appendicitis)?
Appendiceal carcinoid has been reported in 0.3% to 0.9% of appendectomy specimens. It is the most common appendiceal neoplasm. The functioning tumors are commonly serotonin-producing neoplasms. The risk factors for malignancy include size greater than 2 cm and invasion of mesoappendix.