Phrygian Cap Appearance of a Mouse Gallbladder on Magnetic Resonance Imaging

Phrygian Cap Appearance of a Mouse Gallbladder on Magnetic Resonance Imaging

We used live-animal magnetic resonance imaging (MRI) to examine the gallbladders of male mice. These healthy mice were fasted overnight before the study and anesthetized in an animal chamber, with a gas mixture of oxygen and isoflurane for small animal MRI. In the course of these live-animal MRI studies, we observed a Phrygian cap appearance to the gallbladder of one healthy-appearing 6-week-old male mouse, similar to that of the human gallbladder described in many reports.