종양 환자의 F-18 FDG PET/CT에서 관찰된 심근 섭취의 임상적 의미 (Clinical Significance of Myocardial Uptake on F-18 FDG PET/CT Performed in Oncologic Patients) |
Author |
조호진, 조응혁, 이종두, 강원준, |
Ho Jin Cho, M.D., Arthur Cho, M.D., Jong Doo Lee, M.D., Ph.D., and Won Jun Kang, M.D., Ph.D. |
Affiliation |
연세대학교 의과대학 세브란스병원 핵의학과 Division of Nuclear Medicine, Department of Radiology, Yonsei University College of Medicine, Seoul, Korea |
Abstract |
Purpose: F-18 fluorodeoxyglucose (FDG) uptake of myocardium is influenced by various factors. Increased glycolysis, and subsequent increased F-18 FDG uptake has been reported in ischemic cardiomyopathy. However, clinical significance of incidentally found myocardial F-18 FDG uptake has not been clarified. We retrospectively reviewed the degree and pattern of myocardial uptake in patients without history of ischemic heart disease who underwent torso F-18 FDG PET/CT for evaluation of neoplastic disease. Materials and Methods: From January 2005 to June 2009, 77 patients who underwent F-18 FDG PET/CT and Tc-99m sestamibi stress/rest SPECT within 3 months were enrolled. Results: Of 77 patients, 55 (71.4%) showed increased F-18 FDG uptake in the myocardium. In this population, 40 showed uniform uptake pattern, while 15 showed focal uptake. In patients with uniform uptake, 17 showed decreased uptake in the septum without perfusion defect on myocardial SPECT. Remaining 23 patients showed uniform uptake, with 1 reversible perfusion defect and 1 fixed perfusion defect. In 15 patients with focal uptake, 9 showed increased F-18 FDG uptake in the base, and only 1 of them showed reversible perfusion defect on myocardial SPECT. In the remaining 6 focal uptake group, 4 had reversible perfusion defect in the corresponding wall, and 1 had apical hypertrophy. Conclusion: We demonstrated that septal defect pattern and basal uptake pattern in the myocardium may represent normal variants. Focal myocardial uptake other than normal variants on oncologic torso F-18 FDG PET/CT with routine fasting protocol may suggest ischemic heart disease, thus further evaluation is warranted. |
Keyword |
F-18 FDG, PET, myocardium, ischemia, glucose metabolism |
Full text Article |
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