What is the definitive investigation for Meckel's diverticulum?

The definitive investigation for Meckel's diverticulum is laparotomy. This is because Meckel's diverticulum can often be asymptomatic but may lead to complications such as bleeding, obstruction, or inflammation. When surgical exploration is performed via laparotomy, it allows for direct visualization and examination of the diverticulum.

During laparotomy, the surgeon can also address any complications associated with the diverticulum, such as removing it if necessary. This approach provides not only diagnosis but also a potential therapeutic solution. Although imaging studies like ultrasounds, CT scans, and endoscopy can suggest the presence of Meckel's diverticulum or associated complications, they are not definitive. Imaging modalities may miss smaller diverticula or fail to show the exact anatomical details needed for a conclusive diagnosis, particularly in cases where the diverticulum is not inflamed. Thus, laparotomy stands out as the gold standard for definitive diagnosis and intervention.