What term describes a gallbladder anomaly with an internal septum dividing it into two chambers?

What term describes a gallbladder anomaly with an internal septum dividing it into two chambers?

• A. Bilobar (septated)
• B. Hourglass
• C. Bilobed
• D. Duplication

Answer: (A)

The main idea is recognizing a gallbladder with an internal partition. A septated gallbladder has a membrane running inside the lumen that divides it into two chambers. When this internal septum is present, the gallbladder is described as bilobar (septated) because it visually appears like two lobes within one gallbladder. Importantly, there is typically a single cystic duct draining both chambers, so it’s one organ, not two separate gallbladders. This differs from an hourglass configuration, where the lumen narrows in the middle but remains a single cavity rather than being split into two compartments. It also differs from duplication, where there are two distinct gallbladders, each with its own neck and cystic duct. Bilobed describes two lobes without a true internal septum; the key here is the actual septum creating two luminal chambers, which is the feature of a septated, or bilobar, gallbladder.

The main idea is recognizing a gallbladder with an internal partition. A septated gallbladder has a membrane running inside the lumen that divides it into two chambers. When this internal septum is present, the gallbladder is described as bilobar (septated) because it visually appears like two lobes within one gallbladder. Importantly, there is typically a single cystic duct draining both chambers, so it’s one organ, not two separate gallbladders.

This differs from an hourglass configuration, where the lumen narrows in the middle but remains a single cavity rather than being split into two compartments. It also differs from duplication, where there are two distinct gallbladders, each with its own neck and cystic duct. Bilobed describes two lobes without a true internal septum; the key here is the actual septum creating two luminal chambers, which is the feature of a septated, or bilobar, gallbladder.