Abstract:
PURPOSE:Angiotensin-converting enzyme (ACE) and soluble interleukin-2 receptor (sIL-2R) are serological markers, widely used for determining sarcoidosis activity. (18)F-FDG PET has proven to be a sensitive technique in the imaging of sarcoidosis. The aim of this study was to determine sensitivity of (18)F-FDG PET, genotype-corrected ACE and sIL-2R in active sarcoidosis as well as their correlation. METHODS:This retrospective study included 36 newly diagnosed, symptomatic sarcoidosis patients. ACE and sIL-2R levels were simultaneously obtained within 4 weeks of (18)F-FDG PET. ACE was corrected for genotype and expressed as Z-score. (18)F-FDG PET was visually evaluated and scored as positive or negative. Maximum and average standardized uptake values (SUV(max) and SUV(avg)) were compared with ACE and sIL-2R. RESULTS:(18)F-FDG PET was found positive in 34 of 36 patients (94%). Thirteen patients (36%) showed an increased ACE with the highest sensitivity found in patients with the I/I genotype (67%). Seventeen patients (47%) showed an increased sIL-2R. No correlation was found between SUV and ACE or sIL-2R. Increased ACE and sIL-2R correlated with a positive (18)F-FDG PET in 12 patients (92%) and 16 patients (94%), respectively. CONCLUSION:(18)F-FDG PET is a very sensitive technique to assess active sarcoidosis, in contrast with ACE and sIL-2R, suggesting a pivotal role for (18)F-FDG PET in future sarcoidosis assessment.
journal_name
Eur J Nucl Med Mol Imagingauthors
Keijsers RG,Verzijlbergen FJ,Oyen WJ,van den Bosch JM,Ruven HJ,van Velzen-Blad H,Grutters JCdoi
10.1007/s00259-009-1097-xsubject
Has Abstractpub_date
2009-07-01 00:00:00pages
1131-7issue
7eissn
1619-7070issn
1619-7089journal_volume
36pub_type
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