IntroductionAlthough Meckel's diverticulum is the most common congenital abnormality of the gastrointestinal tract and modern imaging techniques are available, its diagnosis remains problematic.Case presentationA technetium-99 scan was performed in an 18-year-old man with abdominal pain, vomiting and rectal bleeding to confirm the presence of a Meckel's diverticulum which was not diagnosed laparoscopically elsewhere. The technetium-99 scan was positive and a diagnostic laparoscopy was re-performed which revealed a Meckel's diverticulum that was subsequently resected.ConclusionWe suggest that a technetium-99m scan should be performed before laparoscopy in children and adolescents with suspected Meckel's diverticulum. A positive technetium-99m scan may significantly contribute to the laparoscopic definitive diagnosis and treatment of a bleeding Meckel's diverticulum. However, diagnostic laparoscopy should only be performed by experienced surgeons.