Incidence of carcinoid tumors in appendectomy specimens

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.
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