Inferior accessory fissure of the lung

Last revised by Raymond Chieng on 14 Mar 2023

Citation, DOI, disclosures and article data

Citation:

Knipe H, Chieng R, Kearns C, et al. Inferior accessory fissure of the lung. Reference article, Radiopaedia.org (Accessed on 29 Nov 2023) https://doi.org/10.53347/rID-22331

DOI:

https://doi.org/10.53347/rID-22331

Permalink:

https://radiopaedia.org/articles/22331?iframe=true

rID:

22331

Article created:

26 Mar 2013, Henry Knipe ◉ ◈

Disclosures:

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

View Henry Knipe's current disclosures

Last revised:

14 Mar 2023, Raymond Chieng ◉

Disclosures:

At the time the article was last revised Raymond Chieng had no financial relationships to ineligible companies to disclose.

View Raymond Chieng's current disclosures

Revisions:

20 times, by 14 contributors - see full revision history and disclosures

Systems:

Chest

Sections:

Anatomy

Tags:

stub, lung, anatomical variant, refs

Synonyms:

Inferior accessory fissure
Twining's line (lung)
Twining's lines (lung)

The inferior accessory fissure of the lung, also known as Twining's line, divides the medial basal bronchopulmonary segment from the rest of the lower lobe ⁴.

Epidemiology

This accessory fissure is present in around 12% of people when examined with CT and is visible on 5-8% of frontal chest x-rays. It is approximately five times more common on the right than the left.