The floating Meckel.

A 10-year-old girl was hospitalized because of abdominal pain and significant gastrointestinal bleeding for 3 days with hematocrit of 28% and hemoglobin of 6.1 mmol/L. Gastroscopy and abdominal ultrasound did not reveal any gastrointestinal abnormalities and parameters of coagulation were normal. Because a Meckel diverticulum is one of the most common causes of lower gastrointestinal bleeding in children, a Tc-99m pertechnetate scan (Meckel's scan) was performed to identify ectopic gastric mucosa. Normally, a Meckel diverticulum is found in the right lower quadrant.