title: Potential false-positive meckel scan due to displaced kidney caused by recurrent retroperitoneal teratoma.
abstract: We report the findings of a Meckel scan in a 19-year-old patient treated for retroperitoneal teratoma with intermittent tarry stool for 1 month. Two focal stases of radioactivity in the right upper quadrant of the abdomen were noted. SPECT/CT for localization revealed that these 2 foci were within the displaced right kidney along with an adjacent bulky retroperitoneal mass. The patient subsequently underwent surgery, and histopathological studies confirmed recurrent teratoma. Two foci of increased radioactivity instead of 1 may have provided hints for the physiological characteristics of such lesions.
authors.affiliation: From the Departments of *Nuclear Medicine and Molecular Imaging Center; †Anatomic Pathology; and ‡Medical Imaging and Intervention, Chang Gung Memorial Hospital, Chang Gung University, College of Medicine, Taoyuan, Taiwan.
authors.forename: Tzu-Pei
authors.initials: TP
authors.lastname: Su
authors.forename: Nai-Ming
authors.initials: NM
authors.lastname: Cheng
authors.forename: Hui-Chieh
authors.initials: HC
authors.lastname: Chuang
authors.forename: Chien-Cheng
authors.initials: CC
authors.lastname: Chen
authors.forename: Chieh
authors.initials: C
authors.lastname: Lin
mesh_terms: D005189:False Positive Reactions; D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D008467:Meckel Diverticulum / Q000000981:diagnostic imaging*; D064847:Multimodal Imaging; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging*; D013724:Teratoma / Q000000981:diagnostic imaging*; D015899:Tomography, Emission-Computed, Single-Photon; D014057:Tomography, X-Ray Computed; D055815:Young Adult