Infundibulum sign (pituitary)

Last revised by Daniel J Bell on 16 Jan 2018

Citation, DOI, disclosures and article data

Citation:

Gaillard F, Bell D, Bickle I, Infundibulum sign (pituitary). Reference article, Radiopaedia.org (Accessed on 23 Apr 2024) https://doi.org/10.53347/rID-17775

DOI:

https://doi.org/10.53347/rID-17775

Permalink:

https://radiopaedia.org/articles/17775

rID:

17775

Article created:

11 May 2012, Frank Gaillard ◉ ◈

Disclosures:

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

View Frank Gaillard's current disclosures

Last revised:

16 Jan 2018, Daniel J Bell ◉

Disclosures:

At the time the article was last revised Daniel J Bell had no recorded disclosures.

View Daniel J Bell's current disclosures

Revisions:

3 times, by 3 contributors - see full revision history and disclosures

Systems:

Central Nervous System

Sections:

Signs

The infundibulum sign is helpful in distinguishing an empty pituitary sella from a cystic lesion of the pituitary region ¹.

In the former, although the sella is enlarged, there is no mass as such and the pituitary infundibulum traverses the enlarged sella to its floor where residual pituitary tissue is present. This represents a positive infundibulum sign.

When a cystic mass is present then the infundibulum is displaced away from the mass. This represents a negative sign.