Gallbladder Cancer or Diffuse Xanthogranulomatous Cholecystitis: A Case of Management Dilemma During Elective Cholecystectomy With Unexpected Severe Mass-Like Pericholecystic Fibrosis and Inflammation.

A 52-year-old man was scheduled to undergo an elective laparoscopic cholecystectomy for an increasingly symptomatic cholelithiasis. The pre-operative diagnosis was established clinically and confirmed with ultrasonography (US), showing gallstones and thickened gallbladder wall. Intraoperatively, extensive dense adhesions of the omentum to the entire subdiaphragmatic surface of the liver and the diaphragm were encountered. The adhesions of the omentum and colon were completely obscuring the Morrison's space with cartilage-like consistency at the supposed anatomical projection of the gallbladder fundus. Due to these unexpected pathological findings and uncertain disease biology, a decision was made to abort and re-schedule the surgery after obtained tissue biopsy results, magnetic resonance cholangiopancreatography (MRCP), and tumor markers carbohydrate antigen 19-9 (CA 19-9), carcinoembryonic antigen (CEA), and alpha fetoprotein (AFP) were available. CA 19-9 was found elevated 10-fold, while AFP and CEA levels were within normal limits. A follow-up cholecystectomy was performed, and final pathology revealed diffuse xanthogranulomatous cholecystitis (XC) and extensive inflammatory changes, adhesions, and fibrosis and no malignancy. The patient tolerated the procedure well and was discharged home on day two after surgery. His follow-up examination was unremarkable. Distinguishing between XC and gallbladder carcinoma is important to appropriately guide management and treatment.