<prompt> Ectopic mucosa of Meckels diverticulum is diagnosed by:Tc-99 radionuclide scanAngiographyCTEndoscopy  <response>: Ans. a Tc-99 radionuclide scanRef: Sabiston 19th edition, Pages 1268-1270 Tc99m radionuclide scan is based on the presence of ectopic gastric mucosa. The sensitivity of the scan can be increased by giving glucagon, pentagastrin or cimetidine. 