<prompt> All of the following about gastrointestinal carcinoid tumours are true, ExceptSmall intestine and appendix account for almost 60 of all gastrointestinal carcinoidRectum is spared5 year survival for carcinoid tumors is 60Appendical carcinoids are more common in females than males  <response>: About 15 rectum is involved in a carcinoid tumour it arises from the submucosa with the overlying intact mucous membrane. Reference SRB 5 the edition page no. 877 