<prompt> Most sensitive investigation for diagnosis of Meckels diverticulum is?USGCT ScanBarium enema99m-Tc pertechnetate scan  <response>: Ans DImaging wise Meckel diverticulum appears like normal bowel, however Meckels bleeds because it has ectopic gastric mucosa - secretes acid - damages the mucosa. Most common presentation of Meckels: GI bleedingQ with abdominal pain. Tc99m - pertechnate scan is most sensitive for diagnosisQ 