Posterior fat pad sign (elbow)
Citation, DOI & article data
Khader.O.Thabet M, Lustosa L, Bell D, et al. Posterior fat pad sign (elbow). Reference article, Radiopaedia.org (Accessed on 26 Nov 2022) https://doi.org/10.53347/rID-45371
The posterior fat pad sign is the visualization of a lucent crescent of fat located in the olecranon fossa on a true lateral view of an elbow joint with the elbow flexed at a right angle indicating an elbow joint effusion. Normally, the posterior fat pad will not be seen in this view.
In the setting of trauma, it suggests an occult non-displaced fracture. In children, a supracondylar fracture should be suspected. In adults, look for a radial head fracture.