Most common tumour occurring in appendix includes
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
Carcinoid tumour
Melanoma
Adeno carcinoma
Mucinous
G.I.T