Gallbladder pseudodiverticulosis mimicking a multiseptate gallbladder with stones

Area of Science:

• Gastroenterology
• Pathology
• Surgical Anatomy

Background:

• Gallbladder diverticula are rare, hernia-like protrusions of the gallbladder wall.
• Pseudodiverticula are acquired, often fundal, and associated with gallstones, lacking smooth muscle.
• Diagnosis is frequently incidental during surgical resection.

Purpose of the Study:

• To report a unique case of multiple gallbladder pseudodiverticula.
• To describe its distinct pathological and imaging features.
• To differentiate it from true diverticula.

Main Methods:

• Case report with pathological examination.
• Review of clinical presentation and surgical findings.
• Endoscopic retrograde cholangiography (ERC) for imaging.

Main Results:

• A unique anomaly of multiple pseudodiverticula was identified.
• The lesion presented with calculous cholecystitis.
• Pathology revealed differences from true diverticula, with a grape-like shape and septated infilling on ERC.

Conclusions:

• Gallbladder pseudodiverticula represent an acquired condition with distinct features.
• This unique presentation underscores the importance of detailed pathological and radiological assessment.
• Accurate diagnosis is crucial for appropriate management, even if incidental.