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  • Title: [Usefulness of 18F-FDG PET for diagnosis of cardiac sarcoidosis].
    Author: Okumura W, Iwasaki T, Ueda T, Seki R, Miyajima A, Hatori T, Sato H, Toyama T, Suzuki T, Matsubara K, Otake H, Aoyagi K, Inoue T, Endo K, Nagai R.
    Journal: Kaku Igaku; 1999 May; 36(4):341-8. PubMed ID: 10390957.
    Abstract:
    Cardiac sarcoidosis, the main cause of death among patients with sarcoidosis, frequently becomes clinically apparent when the disease is far advanced. To evaluate the usefulness of the 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET) in detecting cardiac sarcoidosis, 18F-FDG PET was performed in 16 patients with sarcoidosis (13 female, 63 +/- 12 yrs), compared with scintigraphic findings of 99mTc-MIBI and 67Ga. Ten of 16 patients were considered to have cardiac complications on clinical grounds with tissue confirmation such as positive endomyocardial biopsy, severe ventricular arrhythmia, more than second degree atrioventricular block, and echocardiographically proven ventricular dysfunction. Among these patients with cardiac complications, abnormal myocardial uptake of FDG were observed in all (100%), which confirms significantly higher frequency compared to 67Ga scintigraphy (50%) (abnormality of 99mTc-MIBI SPECT were observed in 80%). Although abnormal FDG accumulations were observed in region with decreased uptake of 99mTc-MIBI in many cases, localization of regional abnormality of each tracer was frequently independent. This discrepancy may reflect inflammatory and degenerative process of myocardium in cardiac sarcoidosis. 18F-FDG PET is thought to be a useful noninvasive method in detecting cardiac involvement of sarcoidosis and may provide a useful information on the activity of the disease.
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