What term describes a gallbladder anomaly with an internal septum dividing it into two chambers and may be partial or complete?

What term describes a gallbladder anomaly with an internal septum dividing it into two chambers and may be partial or complete?

• A. Bilobar (septated)
• B. Multichambered gallbladder
• C. Duplicate gallbladder
• D. Phrygian cap

Answer: (A)

When a gallbladder has an internal septum that divides the lumen into two chambers, the correct descriptor is bilobar or septated. This means there is a single gallbladder that contains a sheet of tissue creating two cavities, which can be partial or complete. On imaging, you may see two adjacent chambers connected by a small channel, yet it still drains as one gallbladder with one cystic duct. This distinguishes it from duplication, where two separate gallbladders each have their own cystic duct, and from a Phrygian cap, which is just a fold of the fundus giving a cap-like appearance rather than a true internal division. The term bilobar (septated) precisely captures the internal division within one gallbladder.

When a gallbladder has an internal septum that divides the lumen into two chambers, the correct descriptor is bilobar or septated. This means there is a single gallbladder that contains a sheet of tissue creating two cavities, which can be partial or complete. On imaging, you may see two adjacent chambers connected by a small channel, yet it still drains as one gallbladder with one cystic duct. This distinguishes it from duplication, where two separate gallbladders each have their own cystic duct, and from a Phrygian cap, which is just a fold of the fundus giving a cap-like appearance rather than a true internal division. The term bilobar (septated) precisely captures the internal division within one gallbladder.