OBJECTIVE: The purpose of this study was to determine the characteristics of paratracheal air cysts (PACs) and their relationship with @entity3794 . MATERIALS AND METHODS: The routine thoracic computed tomography scans of 3549 @entity1 carried out between January 2014 and April 2015 were retrospectively evaluated. The presence, location, structural characteristics (uniloculated or multiloculated), number of cysts, and anterior-posterior and transverse dimensions of the @entity16180 and its communication with the tracheal lumen were evaluated. The presence of @entity82 , @entity2415 , and @entity4595 was also evaluated. The relationship between @entity82 , @entity2415 , @entity4595 , and the presence of @entity45 was evaluated in all @entity1 . An equal number of randomized @entity1 with no @entity45 were selected as a control group. RESULTS: A total of 190 @entity16180 cases were diagnosed, with a prevalence rate of 5.35%: 146 (76.8%) of the cases were @entity1 , 44 (23.2%) were female, and the mean (SD) age was 53.79 (16.64) years (range, 12-89 years). The control group included 105 @entity1 (57.4%) and 78 @entity1 (42.6%), and the mean (SD) age was 53.87 (16.65) years (range, 13-87 years). The groups were similar in terms of age (P = 0.876), whereas the proportion of @entity1 in the @entity16180 group was significantly higher (P < 0.001). Most of the PACs were located on the right side (n = 188, 98.9%). The incidence of @entity82 in the paratracheal cyst group was 45.8% (n = 87) compared with 19.5% (n = 37) in the control group; this difference was statistically significant (P < 0.001). The prevalence rates of @entity2415 in the cyst group and the control group were 29.5% (n = 56) and 11.6% (n = 22), respectively, and the difference was statistically significant (P < 0.001). When the groups were compared regarding @entity4595 (scar and non-scar related), the rate of @entity4595 in the paratracheal cyst group was 17.9% (n = 34), compared with 3.7% (n = 7) in the control group; this difference was statistically significant (P < 0.001). CONCLUSIONS: Paratracheal air cysts are relatively common, but the etiology is still unclear. We detected increased rates of cyst formation that may result from the traction effect on the tracheal wall in the presence of @entity82 .

Is There a Relationship Between Paratracheal Air Cysts and XXXX ?

@entity1 :: ('9606', 'Species') :: ['men', 'women', 'patients'] @entity82 :: ('MESH:D005355', 'Disease') :: ['upper lobe fibrosis', 'fibrosis'] @entity3794 :: ('MESH:D011658', 'Disease') :: ['upper lobe pulmonary fibrosis'] @entity2415 :: ('MESH:D004646', 'Disease') :: ['emphysema'] @entity4595 :: ('MESH:D001987', 'Disease') :: ['bronchiectasis'] @entity45 :: ('MESH:D010181', 'Disease') :: ['paratracheal cysts'] @entity16180 :: ('D017239', 'Chemical') :: ['PAC']
@entity82 :: (MESH:D005355,Disease) :: ['Upper Lobe Fibrosis']
