Gallbladder fossa volume decreased in livers without gallbladders: A cadaveric study

Area of Science:

• Anatomy
• Surgical Pathology

Background:

• The gallbladder is anatomically situated within a fossa on the liver's visceral surface.
• Cholecystectomy, the surgical removal of the gallbladder, is a common procedure.

Purpose of the Study:

• To investigate whether gallbladder fossa volume decreases following cholecystectomy.
• To quantify changes in gallbladder fossa dimensions after gallbladder removal.

Main Methods:

• Cadaveric livers (n=34) from embalmed individuals were analyzed.
• Gallbladder presence was assessed, and fossa volume/dimensions were measured using molds.
• Fossa volume was statistically analyzed, with adjustments for liver weight and femur length.

Main Results:

• Mean gallbladder fossa volume was significantly larger in livers with gallbladders (31.01 ml) compared to those without (8.75 ml) (P<0.0001).
• Fossa dimensions (depth, length, width) were significantly greater in livers possessing gallbladders (P<0.05).
• Reduced fossa volume was observed in livers without gallbladders, irrespective of overall liver size.

Conclusions:

• Cholecystectomy leads to a significant reduction in gallbladder fossa volume.
• Altered mechanical pressures on adjacent hepatocytes post-gallbladder removal may influence fossa volume changes.
• The study demonstrates a quantifiable anatomical consequence of gallbladder removal on liver morphology.