system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Most common tumour occurring in appendix includes
assistant
The correct answer is  Carcinoid tumours arise in argentaffin tissue (Kulchitsky cells of the crypts of Lieberkuhn) and are most common in the vermiform appendix.The tumour can occur in any pa of the appendix, but it is frequently found in the distal third Ref: Bailey & Love&;s Sho Practice of Surgery,E25,Page-1217