Your institution is subscribed to Read Institutional Edition. Log in or Sign Up to read full text articles.

JOURNAL ARTICLE

Tracheal morphology in patients with tracheomalacia: prevalence of inspiratory lunate and expiratory "frown" shapes

Phillip M Boiselle, Armin Ernst
Journal of Thoracic Imaging 2006, 21 (3): 190-6
16915063

OBJECTIVE: To identify the spectrum of tracheal morphologies in patients with tracheomalacia, and to determine the prevalence of specific inspiratory (lunate) and expiratory (frown) shapes that have been associated with this condition.

MATERIALS AND METHODS: A retrospective review was performed of a consecutive series of patients with bronchoscopically-proven tracheomalacia who were imaged with inspiratory and dynamic-expiratory computed tomography (CT). The CT images of each patient were reviewed in a blinded, randomized fashion by an experienced thoracic radiologist. For each case, the shape of the trachea at end-inspiration and dynamic expiration was classified using specific tracheal morphologies described in the literature.

RESULTS: The study population included 17 patients, with a mean age of 54 years. At inspiration, 16 (94%) of 17 subjects demonstrated a normal tracheal configuration (round, oval, horseshoe, or inverted-pear shape), and 1 (6%) of 17 subjects demonstrated an abnormal "lunate" tracheal configuration (coronal: sagittal ratio >1). At expiration, 9 (53%) of 17 subjects demonstrated a crescenteric, "frown" shape; 1 (6%) subject demonstrated complete collapse; and 7 (41%) subjects demonstrated other morphologies.

CONCLUSIONS: Inspiratory tracheal morphology is almost always normal in patients with tracheomalacia, with a lunate configuration only rarely observed. In contrast, an expiratory "frown sign" is observed in approximately half of patients with this condition. This sign has the potential to aid the detection of tracheomalacia when patients inadvertently breathe during routine CT scans.

Full Text Links

Find Full Text Links for this Article

Discussion

You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read
16915063
×

Save your favorite articles in one place with a free QxMD account.

×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"

We want to hear from doctors like you!

Take a second to answer a survey question.