title: Evaluation of Mediastinal Lymph Nodes in Sarcoidosis, Sarcoid Reaction, and Malignant Lymph Nodes Using CT and FDG-PET/CT.
abstract: The aim of this study was to analyze the clinical, computed tomography (CT), and positron emission tomography (PET) findings of sarcoidosis, sarcoid reaction, and malignant lymph nodes (LNs) to the results of transbronchial LN aspiration and biopsy (TBNA).The TBNA results of mediastinal and hilar LNs of 152 patients in our hospital from July 2008 to March 2013 were retrospectively reviewed. Two independent radiologists measured the size and attenuation of LNs on CT and assessed the probability of the 3 categories: sarcoidosis (n = 36), sarcoid reaction (n = 25), or malignant LNs (n = 91). The total volume and attenuation of LNs were measured using Image J (NIH). The median maximum standardized uptake value (maxSUV) of the 3 mediastinal and hilar LNs on PET/CT was obtained.There was no significantly different CT finding between sarcoidosis and sarcoid reaction. Multivariate analysis showed that the age, total volume of LNs, and number of enlarged LNs significantly differed between sarcoid reaction and malignant LNs. Sarcoid reaction tends to be occurred in young patients (P = 0.007), the total volume of LNs was smaller (P = 0.04) than that of malignant LNs, and there were significantly more LNs >1 cm (P = 0.005). The median maxSUV of the 3 highest SUVs of the LNs did not significantly differ between the 3 entities.
authors.affiliation: From the Department of Radiology and Research Institute of Radiology (HJK, MYK, SYS), Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; Department of Diagnostic Radiology (SS), University of Texas MD Anderson Cancer Center, Houston, TX; Department of Healthcare Management (S-SK), Cheongju University, Cheongju, Republic of Korea; Pulmonary and Critical Care Medicine (SWL, C-MC), Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; and Division of Oncology (C-MC), Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
authors.forename: Hyun Jung
authors.initials: HJ
authors.lastname: Koo
authors.forename: Mi Young
authors.initials: MY
authors.lastname: Kim
authors.forename: So Youn
authors.initials: SY
authors.lastname: Shin
authors.forename: Sooyoung
authors.initials: S
authors.lastname: Shin
authors.forename: Sung-Soo
authors.initials: SS
authors.lastname: Kim
authors.forename: Sei Won
authors.initials: SW
authors.lastname: Lee
authors.forename: Chang-Min
authors.initials: CM
authors.lastname: Choi
mesh_terms: D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D061765:Endoscopic Ultrasound-Guided Fine Needle Aspiration; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008223:Lymphoma / Q000175:diagnosis* / Q000473:pathology*; D008297:Male; D008482:Mediastinum; D008875:Middle Aged; D009367:Neoplasm Staging; D049268:Positron-Emission Tomography; D012129:Respiratory Function Tests; D012189:Retrospective Studies; D012507:Sarcoidosis / Q000175:diagnosis* / Q000473:pathology*; D014057:Tomography, X-Ray Computed
chemical_list: D019788:Fluorodeoxyglucose F18