Anterior bronchus sign
Updates to Article Attributes
Body
was changed:
The anterior bronchus sign refers to the appearance of the anterior segmental bronchus of the upper lobes as seen on a frontal chest radiograph.
Normal anatomy
The anterior segment bronchus of the upper lobes courses anteriorly and laterally. When the orientation is predominantly anteriorly the bronchus is seen end on as a ring shadow. This occurs in approximately 50~50% of the time.
Upper limit inof the adjacent soft tissue thickness
Normally there is at most 3 mm of soft tissue lateral to the bronchus. Presence of more than 6 mm of soft tissue implies the presences of a mass, and warrants cross-sectional imaging.
-<p>The <strong>anterior bronchus sign</strong> refers to the appearance of the anterior segmental bronchus of the upper lobes as seen on a frontal chest radiograph. </p><h4>Normal anatomy</h4><p>The anterior segment bronchus of the upper lobes courses anteriorly and laterally. When the orientation is predominantly anteriorly the bronchus is seen end on as a ring shadow. This occurs in approximately 50% of the time. </p><h4>Upper limit in adjacent soft tissue thickness</h4><p>Normally there is at most <strong>3 </strong>mm of soft tissue lateral to the bronchus. Presence of more than <strong>6 </strong>mm of soft tissue implies the presences of a mass, and warrants cross-sectional imaging. </p>- +<p>The <strong>anterior bronchus sign</strong> refers to the appearance of the anterior segmental bronchus of the upper lobes as seen on a frontal chest radiograph.</p><h4>Normal anatomy</h4><p>The anterior segment bronchus of the upper lobes courses anteriorly and laterally. When the orientation is predominantly anteriorly the bronchus is seen end on as a ring shadow. This occurs ~50% of the time.</p><h4>Upper limit of the adjacent soft tissue thickness</h4><p>Normally there is at most <strong>3 </strong>mm of soft tissue lateral to the bronchus. Presence of more than <strong>6 </strong>mm of soft tissue implies the presences of a mass, and warrants cross-sectional imaging.</p>
Unable to process the form. Check for errors and try again.