title: 13-Year-old boy with a 3-day history of melena.
authors.affiliation: William Beaumont Hospital, Royal Oak, MI, USA.
authors.forename: Katie
authors.initials: K
authors.lastname: Traylor
authors.forename: Laura
authors.initials: L
authors.lastname: Gonzalez-Krellwitz
authors.forename: Helena
authors.initials: H
authors.lastname: Balon
mesh_terms: D000293:Adolescent; D005188:False Negative Reactions; D006801:Humans; D008297:Male; D008551:Melena / Q000000981:diagnostic imaging* / Q000473:pathology / Q000503:physiopathology; D011877:Radionuclide Imaging; D012680:Sensitivity and Specificity; D013670:Sodium Pertechnetate Tc 99m
chemical_list: D013670:Sodium Pertechnetate Tc 99m