title: Incompletely dissolved radioiodine capsule as a likely cause of false-positive whole-body scan in thyroid cancer.
abstract: Radioiodine is highly specific for detecting functioning thyroid tissue in the body. However, an unexpected radioiodine uptake can cause various false-positive results in whole-body scanning. We report a case of a 47-year-old woman who showed strong and focal uptake in the right pelvic area suggesting metastasis on the posttreatment whole-body scan. SPECT/CT revealed that the uptake was located in the colon, and the uptake was completely egested after additional bowel preparation.
authors.affiliation: From the *Department of Nuclear Medicine, Raphael Hospital; †Department of Nuclear Medicine, Kyungpook National University School of Medicine and Hospital; and ‡Department of Internal Medicine, Raphael Hospital, Daegu, Republic of Korea.
authors.forename: Jong-Ryool
authors.initials: JR
authors.lastname: Oh
authors.forename: Shin Young
authors.initials: SY
authors.lastname: Jeong
authors.forename: Hyundae
authors.initials: H
authors.lastname: Yoon
mesh_terms: D002214:Capsules / Q000009:adverse effects; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes / Q000008:administration & dosage; D008875:Middle Aged; D064847:Multimodal Imaging; D019275:Radiopharmaceuticals / Q000008:administration & dosage; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging*; D015899:Tomography, Emission-Computed, Single-Photon; D014057:Tomography, X-Ray Computed; D051598:Whole Body Imaging
chemical_list: D002214:Capsules; D007457:Iodine Radioisotopes; D019275:Radiopharmaceuticals