Normal Gallbladder variants- Phrygian cap:

The Phrygian cap shape of the gallbladder (Gall Bladder) is a known variant. See ultrasound image below:

 

The gallbladder shows a septate appearance in this image. But is this really a septate gallbladder? See ultrasound video clip below:

Still not sure? See the ultrasound video clip below:

 

The commonest cause for the"septate" appearance of the gallbladder is the Phrygian cap anatomical variant. For more on this topic see: http://www.ultrasound-images.com/gall-bladder.htm  The best method to demonstrate this variant of the GB is to unfold the gallbladder, by angling the probe to the length of the gallbladder- this displays the "cap" formed by the GB fundus. (See ultrasound picture below)-

 













The picture above shows the "unfolded" view of the gallbladder, with the Phrygian cap (arrow) clearly.