title: False-positive iodine-131 body scan caused by a large renal cyst.
abstract: Focal I-131 accumulation is generally a reliable indicator of functioning thyroid tissue or a differentiated thyroid cancer metastasis. Normal accumulation of activity may be seen in areas such as the intestinal tract, liver, and salivary glands. This report describes a patient with significant accumulation of I-131 in the right upper quadrant of the abdomen. The abnormality, first thought to represent metastatic thyroid carcinoma, was subsequently proven to be accumulation within a large renal cyst.
authors.affiliation: Department of Nuclear Medicine, Cedars-Sinai Medical Center, Los Angeles, California 90048.
authors.forename: M B
authors.initials: MB
authors.lastname: Brachman
authors.forename: B J
authors.initials: BJ
authors.lastname: Rothman
authors.forename: L
authors.initials: L
authors.lastname: Ramanna
authors.forename: D E
authors.initials: DE
authors.lastname: Tanasescu
authors.forename: H
authors.initials: H
authors.lastname: Adelberg
authors.forename: A D
authors.initials: AD
authors.lastname: Waxman
mesh_terms: D000008:Abdominal Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary*; D000230:Adenocarcinoma / Q000000981:diagnostic imaging / Q000556:secondary*; D003937:Diagnosis, Differential; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes; D052177:Kidney Diseases, Cystic / Q000000981:diagnostic imaging*; D008875:Middle Aged; D011859:Radiography; D011877:Radionuclide Imaging; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging*
chemical_list: D007457:Iodine Radioisotopes