Results Gastrointestinal bleeding was found in 83 cases by the imaging examination, among whom 6 were misdiagnosed due to Meckel's diverticulum, hydronephrosis at the upper pole of the right kidney or deformity of the blood vessels in the abdominal cavity. 结果发现出血83例,其中6例因麦克尔憩室、右肾上极积水及腹腔血管畸形而误诊阳性。