title: Obstructed ectopic kidney mimicking Chilaiditi syndrome on F-18 FDG imaging.
abstract: Fluorine-18 fluorodeoxyglucose positron emission tomography was obtained in a patient with a duodenal mass. Conventional imaging revealed multiple dilated intestinal loops. Initial impression of positron emission tomographic images was interposition of a loop of bowel between the liver and diaphragm (Chilaiditi syndrome) in an unusual location, with absent right kidney activity. Computed tomography and magnetic resonance imaging of the abdomen showed an obstructed ectopic kidney in this position with a markedly dilated collecting system. There is absence of fluorodeoxyglucose in the markedly dilated renal collecting system resulting from acute obstruction, giving the false appearance of gas-filled bowel loops with an unusual location of the interposition.
authors.affiliation: *Department of Radiology (Nuclear Medicine Section), Louisiana State University School of Medicine.
authors.forename: Madhusudhan P
authors.initials: MP
authors.lastname: Reddy
authors.forename: Anil
authors.initials: A
authors.lastname: Malik
authors.forename: Ramin
authors.initials: R
authors.lastname: Zamani
authors.forename: David L
authors.initials: DL
authors.lastname: Lilien
mesh_terms: D003937:Diagnosis, Differential; D019788:Fluorodeoxyglucose F18; D006801:Humans; D006869:Hydronephrosis / Q000000981:diagnostic imaging* / Q000209:etiology; D007410:Intestinal Diseases / Q000000981:diagnostic imaging*; D007668:Kidney / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D013577:Syndrome; D014517:Ureteral Obstruction / Q000150:complications / Q000000981:diagnostic imaging*
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18