The Role of 18F-FDG PET/CT in the Evaluation of Peritoneal Thickening of Undetermined Origin. Issue 15 (April 2016)

• Record Type: Journal Article
• Authors: Chen, Ruohua; Chen, Yumei; Liu, Liu; Zhou, Xiang; Liu, Jianjun; Huang, Gang
• Other Names: Talekar. Kiran section editor.
• Is Part Of: Medicine. Volume 95:Issue 15(2016)
• Publication Date: 2016-04
• Subjects: Medicine -- Periodicals; Medicine -- Periodicals; Médecine -- Périodiques; Geneeskunde; Medicine; Periodicals; Periodicals; 610.5
• DOI: 10.1097/MD.0000000000003023
• Languages: English
• ISSNs: 0025-7974

Abstract

Abstract : Abstract: The aim of this study was to assess the value of 18 F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT) for the differentiation of peritoneal thickening of undetermined origin. This retrospective study included 103 patients (44 men and 59 women, age 59.2 ± 14.8 years) who had undergone 18 F-FDG PET/CT for the evaluation of peritoneal thickening of undetermined origin. All 18 F-FDG PET/CT images were visually interpreted, and the maximal standardized uptake values (SUVmax ) were measured. We compared the role of 18 F-FDGPET/CT with that of CT alone in detecting peritoneal thickening of undetermined origin. We also compared the differences between malignant and tuberculous peritoneal thickening in PET/CT parameters and clinical characteristics. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy in detecting the primary cause of the peritoneal thickening were 76.2%, 78.9%, 94.1%, 42.9%, and 81.2%, respectively, for 18 F-FDG PET/CT, and 58.3%, 84.2%, 94.2%, 31.4%, and 63.1%, respectively, for CT imaging. Malignant peritoneal thickening had significantly higher SUVmax than nontuberculous benign peritoneal thickening. However, tuberculous peritoneal thickening also had a high SUVmax . There were some factors that were significantly different between patients with tuberculous peritoneal thickening and those with malignant peritoneal thickening in our study; these included age, pattern of peritoneal thickening, and presence of ascites. 18 F-FDG PET/CT is useful for detecting the underlying cause of peritoneal thickening. Special attention should be paid to peritoneal tuberculosis, which has a high SUVmax and may mimic malignant peritoneal thickening. Multiple PET/CT parameters which were different in patients with tuberculous and malignant causes could be taken into consideration to make the differential diagnosis.