title: Rectal bleeding in a 4-month-old boy.
mesh_terms: D006471:Gastrointestinal Hemorrhage / Q000000981:diagnostic imaging* / Q000209:etiology; D006801:Humans; D007223:Infant; D008297:Male; D008467:Meckel Diverticulum / Q000150:complications / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D013670:Sodium Pertechnetate Tc 99m
chemical_list: D013670:Sodium Pertechnetate Tc 99m