WEN-YI LIMEI-FANG CHENGChiu F.-C.YEN-WEN WU2021-12-022021-12-0220090363-9762https://www.scopus.com/inward/record.uri?eid=2-s2.0-67650575668&doi=10.1097%2fRLU.0b013e3181a3465b&partnerID=40&md5=61a01fc369e5df14882de81e8298aa1dhttps://scholars.lib.ntu.edu.tw/handle/123456789/589434Noncardiac abnormalities are not uncommon in myocardial perfusion imaging. With the advent of SPECT/CT hybrid system, CT could produce high-quality attenuation maps to improve resolution. In addition, extracardiac abnormalities are easily differentiated by using SPECT/CT. We report a 47-year-old man who felt chest tightness on exertion for 2 months. He denied hypertension, diabetes mellitus, or hyperlipidemia. Dipyridamole stress and redistribution myocardial SPECT revealed no perfusion defect. However, a retrocardiac mass with focal radioactivity was identified in the projection images, corresponding to a kidney shadow in the low-dose noncontrast CT scan. Subsequent conventional CT scan confirmed the diagnosis of thoracic renal ectopia. ? 2009 Lippincott Williams & Wilkins.[SDGs]SDG3dipyridamole; thallium 201; adult; article; case report; chest tightness; computer assisted tomography; contrast enhancement; diaphragm hernia; ectopic kidney; heart muscle perfusion; human; male; radioactivity; single photon emission computer tomography; thoracic renal ectopia; thorax pain; Chest Pain; Humans; Kidney; Male; Middle Aged; Myocardial Perfusion Imaging; Tomography, Emission-Computed, Single-Photon; Tomography, X-Ray Computedjournal article10.1097/RLU.0b013e3181a3465b194878522-s2.0-67650575668