Diagnostic performance of 18F-FDG-labeled white blood cell PET/CT for cyst infection in patients with autosomal dominant polycystic kidney disease: a prospective study. Issue 5 (May 2016)

• Record Type: Journal Article
• Authors: Kwon, Hyun Woo; Lee, Ho-Young; Hwang, Young-Hwan; Park, Hayne Cho; Ahn, Curie; Kang, Keon Wook
• Is Part Of: Nuclear medicine communications. Volume 37:Issue 5(2016:May)
• Publication Date: 2016-05
• Subjects: autosomal dominant polycystic kidney disease -- cyst infection -- WBC PET/CT -- white blood cell; Nuclear medicine -- Periodicals; 616.07575
• DOI: 10.1097/MNM.0000000000000466
• Languages: English
• ISSNs: 0143-3636

Abstract

Abstract : Objectives: Cyst infection (CI) is a common problem in patients with autosomal dominant polycystic kidney disease (ADPKD) and the accurate detection of infected cysts is very important. We evaluated the diagnostic performance of fluorine-18 fluorodeoxyglucose-labeled white blood cell (WBC) PET/computed tomography (CT) for detection of infected cysts in patients with ADPKD. Patients and methods: Seventeen patients with ADPKD (male : female, 6 : 11; age, 53±9 years) and suspected CI were enrolled in this prospective study. Patients were classified as having definite/probable/possible CI. All patients underwent WBC PET/CT within 2 days of starting antibiotic treatment. The degree of WBC accumulation was evaluated qualitatively by nuclear medicine physicians. The diagnostic performance of WBC PET/CT was evaluated by sensitivity, specificity, positive predictive values, and negative predictive values. These values were compared with those generated from CT scans and MRI. Results: Seven patients were classified as having renal CI (definite 6, probable 1). In this group, WBC PET/CT showed six positive findings and one equivocal finding. Seven patients were diagnosed with possible infection. In this group, WBC PET/CT showed six negative findings and one indeterminate finding. The diagnostic performance of WBC PET/CT showed advantages over CT or MRI scans (sensitivity 85.7%, specificity 87.5%, positive predictive value 85.7%, negative predictive value 87.5%). Conclusion: This prospective study shows that WBC PET/CT can provide an accurate diagnosis of CI in patients with ADPKD.