Anterior bronchus sign

Last revised by Henry Knipe on 25 Apr 2019

Citation, DOI, disclosures and article data

Citation:

Gaillard F, Knipe H, Bell D, Anterior bronchus sign. Reference article, Radiopaedia.org (Accessed on 19 Apr 2024) https://doi.org/10.53347/rID-8833

DOI:

https://doi.org/10.53347/rID-8833

Permalink:

https://radiopaedia.org/articles/8833?iframe=true

rID:

8833

Article created:

2 Mar 2010, Frank Gaillard ◉ ◈

Disclosures:

At the time the article was created Frank Gaillard had no recorded disclosures.

View Frank Gaillard's current disclosures

Last revised:

25 Apr 2019, Henry Knipe ◉ ◈

Disclosures:

At the time the article was last revised Henry Knipe had no recorded disclosures.

View Henry Knipe's current disclosures

Revisions:

2 times, by 2 contributors - see full revision history and disclosures

Systems:

Chest

Sections:

Signs

Tags:

bronchus, bronchial tree, cases, refs

The anterior bronchus sign refers to the appearance of the anterior segmental bronchus of the upper lobes as seen on a frontal chest radiograph.

Gross 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 ~50% of the time.

Related pathology

The upper limit of the adjacent soft tissue thickness:

normal: <3 mm of soft tissue lateral to the bronchus
abnormal: >6 mm of soft tissue implies the presences of a mass, and warrants cross-sectional imaging

References

Promoted articles (advertising)

ADVERTISEMENT: Supporters see fewer/no ads