Right paratracheal air cysts in the thoracic inlet: Clinical and radiologic significance

Jin Mo Goo, Jung Gi Im, Joong Mo Ahn, Wookyung Moon, Jin Wook Chung, Jae Hyung Park, Joon Beom Seo, Man Chung Han

Research output: Contribution to journalArticle

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Abstract

OBJECTIVE. The purpose of our study was to determine the CT appearance and clinical significance of a fight paratracheal air cyst at the level of the thoracic inlet. MATERIALS AND METHODS. Sixty-five consecutive patients with paratracheal air cysts were included in this study. The location, level, size, and shape of the paratracheal air cysts on CT were analyzed. The spirometric data, tracheal indexes, and CT-determined emphysema scores of these patients were compared with those of 60 consecutive patients in a control group. RESULTS. The air cysts were located at the right posterolateral aspect of the trachea in 64 (98%) of 65 patients and at T1-T2 vertebral levels in 57 (88%) of 65 patients. The mean diameter of the right paratracheal cysts was 10 mm in the axial plane and 14 mm in the vertical plane. CT showed a communicating channel with the trachea in five patients. The ratio of forced expiratory volume obtained in 1 sec to forced vital capacity, and forced expiratory flow between 25% and 75% of vital capacity in patients with paratracheal air cysts, were significantly lower than those of the control group (p < .05). Differences in the tracheal indexes and CT- determined emphysema scores between the study group and the control group were found to be statistically significant (p = .001). CONCLUSION. The most probable nature of a right paratracheal cyst in the thoracic inlet is tracheal diverticulum with a narrow stalk. The presence of a right paratracheal air cyst on CT could be a sign of obstructive lung disease clinically and of the presence of emphysema radiologically.

Original languageEnglish
Pages (from-to)65-70
Number of pages6
JournalAmerican Journal of Roentgenology
Volume173
Issue number1
DOIs
StatePublished - 1 Jan 1999

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Mediastinal Cyst
Cysts
Air
Emphysema
Vital Capacity
Trachea
Control Groups
Obstructive Lung Diseases
Diverticulum
Forced Expiratory Volume
Thorax

Cite this

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title = "Right paratracheal air cysts in the thoracic inlet: Clinical and radiologic significance",
abstract = "OBJECTIVE. The purpose of our study was to determine the CT appearance and clinical significance of a fight paratracheal air cyst at the level of the thoracic inlet. MATERIALS AND METHODS. Sixty-five consecutive patients with paratracheal air cysts were included in this study. The location, level, size, and shape of the paratracheal air cysts on CT were analyzed. The spirometric data, tracheal indexes, and CT-determined emphysema scores of these patients were compared with those of 60 consecutive patients in a control group. RESULTS. The air cysts were located at the right posterolateral aspect of the trachea in 64 (98{\%}) of 65 patients and at T1-T2 vertebral levels in 57 (88{\%}) of 65 patients. The mean diameter of the right paratracheal cysts was 10 mm in the axial plane and 14 mm in the vertical plane. CT showed a communicating channel with the trachea in five patients. The ratio of forced expiratory volume obtained in 1 sec to forced vital capacity, and forced expiratory flow between 25{\%} and 75{\%} of vital capacity in patients with paratracheal air cysts, were significantly lower than those of the control group (p < .05). Differences in the tracheal indexes and CT- determined emphysema scores between the study group and the control group were found to be statistically significant (p = .001). CONCLUSION. The most probable nature of a right paratracheal cyst in the thoracic inlet is tracheal diverticulum with a narrow stalk. The presence of a right paratracheal air cyst on CT could be a sign of obstructive lung disease clinically and of the presence of emphysema radiologically.",
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Right paratracheal air cysts in the thoracic inlet : Clinical and radiologic significance. / Goo, Jin Mo; Im, Jung Gi; Ahn, Joong Mo; Moon, Wookyung; Chung, Jin Wook; Park, Jae Hyung; Seo, Joon Beom; Han, Man Chung.

In: American Journal of Roentgenology, Vol. 173, No. 1, 01.01.1999, p. 65-70.

Research output: Contribution to journalArticle

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T2 - Clinical and radiologic significance

AU - Goo, Jin Mo

AU - Im, Jung Gi

AU - Ahn, Joong Mo

AU - Moon, Wookyung

AU - Chung, Jin Wook

AU - Park, Jae Hyung

AU - Seo, Joon Beom

AU - Han, Man Chung

PY - 1999/1/1

Y1 - 1999/1/1

N2 - OBJECTIVE. The purpose of our study was to determine the CT appearance and clinical significance of a fight paratracheal air cyst at the level of the thoracic inlet. MATERIALS AND METHODS. Sixty-five consecutive patients with paratracheal air cysts were included in this study. The location, level, size, and shape of the paratracheal air cysts on CT were analyzed. The spirometric data, tracheal indexes, and CT-determined emphysema scores of these patients were compared with those of 60 consecutive patients in a control group. RESULTS. The air cysts were located at the right posterolateral aspect of the trachea in 64 (98%) of 65 patients and at T1-T2 vertebral levels in 57 (88%) of 65 patients. The mean diameter of the right paratracheal cysts was 10 mm in the axial plane and 14 mm in the vertical plane. CT showed a communicating channel with the trachea in five patients. The ratio of forced expiratory volume obtained in 1 sec to forced vital capacity, and forced expiratory flow between 25% and 75% of vital capacity in patients with paratracheal air cysts, were significantly lower than those of the control group (p < .05). Differences in the tracheal indexes and CT- determined emphysema scores between the study group and the control group were found to be statistically significant (p = .001). CONCLUSION. The most probable nature of a right paratracheal cyst in the thoracic inlet is tracheal diverticulum with a narrow stalk. The presence of a right paratracheal air cyst on CT could be a sign of obstructive lung disease clinically and of the presence of emphysema radiologically.

AB - OBJECTIVE. The purpose of our study was to determine the CT appearance and clinical significance of a fight paratracheal air cyst at the level of the thoracic inlet. MATERIALS AND METHODS. Sixty-five consecutive patients with paratracheal air cysts were included in this study. The location, level, size, and shape of the paratracheal air cysts on CT were analyzed. The spirometric data, tracheal indexes, and CT-determined emphysema scores of these patients were compared with those of 60 consecutive patients in a control group. RESULTS. The air cysts were located at the right posterolateral aspect of the trachea in 64 (98%) of 65 patients and at T1-T2 vertebral levels in 57 (88%) of 65 patients. The mean diameter of the right paratracheal cysts was 10 mm in the axial plane and 14 mm in the vertical plane. CT showed a communicating channel with the trachea in five patients. The ratio of forced expiratory volume obtained in 1 sec to forced vital capacity, and forced expiratory flow between 25% and 75% of vital capacity in patients with paratracheal air cysts, were significantly lower than those of the control group (p < .05). Differences in the tracheal indexes and CT- determined emphysema scores between the study group and the control group were found to be statistically significant (p = .001). CONCLUSION. The most probable nature of a right paratracheal cyst in the thoracic inlet is tracheal diverticulum with a narrow stalk. The presence of a right paratracheal air cyst on CT could be a sign of obstructive lung disease clinically and of the presence of emphysema radiologically.

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