Objective: The article presents a case of a 24-year old man with ectopic gastric mucosa in Meckel's diverticulum. Ectopic gastric mucosa may be present in Meckel's diverticulum and may be associated with peptic ulcer disease and lower gastrointestinal (GI) bleeding. Diagnosing ectopic gastric mucosa can largely benefit from 99"Tc-pertechnetate scintigraphy.

Methods: A 24-year old man underwent Meckel's diverticulum scintigraphy for timely anamnesis of GI bleeding from uncertain source (enterorrhagia, haemorrhagic anaemia). Upper tract and large bowel endoscopy, enteroclysis, ultrasound, CT and radioactive labelled red blood cells scintigraphy resluts were negative.

Results: Ectopic gastric mucosa was detected by 99mTc-pertechnetate scintigraphy. The patient underwent surgery and part of the proximal ileum including Meckel's diverticulum with ectopic gastric mucosa detected by histology was resected.

Conclusions: Meckel's diverticulum scintigraphy can help detect ectopic gastric mucosa and improve the disease management in a patient with gastrointestinal bleeding.