title: [Evaluation of bronchial mucosa involvement in sarcoidosis patients using ¹⁸F-FDG PET-CT].
abstract: OBJECTIVE
  To explore the value of ¹⁸F-FDG PET-CT in evaluating bronchial mucosa involvement in patients with saroidosis.
  
  
  METHODS
  A retrospective analysis was conducted among 6 sarcoidosis patients with and 14 patients without bronchial mucosa involvement to collect the data including the standard uptake value (SUVMax/Mean) of ¹⁸F-FDG, serum angiotensin converting enzyme (sACE), and proportion of lymphocytes and CD4⁺/CD8 ⁺ T lymphocyte ratio in bronchoalveolar lavage fluid (BALF).
  
  
  RESULTS
  The lung focal SUV(Max/Mean) was higher in patients with bronchial mucosa involvement than those without (7.04 ± 5.83/5.00 ± 4.69 vs 5.68 ± 3.66/3.82 ± 2.39), but such differences were not statistically significant (P=0.565/0.495). The SUV(Max/Mean) of the hilum of the lung and the mediastina lymph nodes were significantly higher in patients with bronchial mucosa involvement (13.28 ± 5.57/10.48 ± 4.43 vs 6.20 ± 1.77/4.52 ± 1.43, P=0.0003/0.0002; 13.84 ± 4.35/9.69 ± 2.74 vs 7.16 ± 2.52/5.28 ± 1.77, P=0.0004/0.0004). The level of sACE and CD4⁺/CD8 ⁺ T lymphocyte ratio in BALF were also significantly higher in patients with bronchial mucosa involvement (60.58 ± 16.3 vs 49.16 ± 13.3 IU/L, P=0.045; 7.30 ± 5.0 vs 2.90 ± 3.1, P=0.026). The proportion of lymphocytes in BALF was comparable between the patients with and without bronchial mucosa involvement (44.10 ± 10.3% vs 35.30 ± 12.5%, P=0.148).
  
  
  CONCLUSIONS
  For patients with saroidosis, ¹⁸F-FDG PET-CT is useful in evaluating bronchial mucosa involvement, which is one of the key features of active sarcoidosis.
authors.affiliation: raduate Student Team of Medical School of Chinese PLA, Beijing 100853, China. E-mail: 15300186577@163.com.
authors.forename: Chunyang
authors.initials: C
authors.lastname: Zhang
authors.forename: Huasong
authors.initials: H
authors.lastname: Feng
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xiao
authors.initials: X
authors.lastname: Lei
authors.forename: Yingkui
authors.initials: Y
authors.lastname: Liang
authors.forename: Xinmin
authors.initials: X
authors.lastname: Ding
authors.forename: Jiguang
authors.initials: J
authors.lastname: Meng
authors.forename: Zhihai
authors.initials: Z
authors.lastname: Han
mesh_terms: D001980:Bronchi / Q000473:pathology*; D001992:Bronchoalveolar Lavage Fluid; D016516:CD4-CD8 Ratio; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology; D007703:Peptidyl-Dipeptidase A / Q000097:blood; D049268:Positron-Emission Tomography; D020545:Respiratory Mucosa / Q000473:pathology*; D012189:Retrospective Studies; D012507:Sarcoidosis / Q000175:diagnosis*
chemical_list: D019788:Fluorodeoxyglucose F18; D007703:Peptidyl-Dipeptidase A