An Important Gallbladder Pathology Mimicking Gallbladder Carcinoma: Xanthogranulomatous Cholecystitis: A Single Tertiary Center Experience.

BACKGROUND: Xanthogranulomatous cholecystitis (XGC) is an uncommon, focal, or diffuse destructive inflammatory disease of the gallbladder mimicking or being together with the gallbladder carcinoma. This study aimed to evaluate the diagnosis, treatment, and outcomes of patients with XGC as a single tertiary center experience in the light of literature. MATERIALS AND METHODS: Data about 34 patients with XGC identified after evaluating 2212 cholecystectomy specimens between January 2013 and December 2018 in a single tertiary center were documented to determine demographics (sex, age), clinical symptoms and findings, biochemical and imaging clues and operative findings, duration of hospitalization, postoperative complications, and histopathologic results. RESULTS: Thirty-four patients with XGC were evaluated (17 male and 17 female patients with a mean age of 53; range, 25 to 78). Preoperative diagnosis was chronic calculous cholecystitis in 5 patients, cholelithiasis in 12 cases, acute calculous cholecystitis in 16 and emphysematous cholecystitis in 1 patient. Ultrasound was performed in all patients, computerized tomography in 11, contrast-enhanced magnetic resonance imaging in 9, and magnetic resonance cholangiopancreatography in 7 patients. None of the patients were diagnosed preoperatively. All patients received laparoscopic cholecystectomy, among whom 9 were converted to open. Partial cholecystectomy was performed in 1 patient. One patient with gallbladder adenocarcinoma was treated with radical cholecystectomy. XGC has nonspecific clinical and radiologic findings; thus, preoperative diagnosis is generally absent. Open cholecystectomy is the recommended treatment modality. Conversion to open is frequently necessary after laparoscopy. Complete cholecystectomy is the ultimate goal; however, partial cholecystectomy may be preferred to protect the structures of the hepatic hilum. Preoperative imaging studies (ultrasound or computerized tomography) of 34 patients showed a gallbladder stone in 18 patients, microlithiazis in 12 patients, sludge in 10 patients, and gallbladder sclerosis in 5 patients. CONCLUSIONS: Diagnosis of XGC and differentiation from gallbladder carcinoma may be difficult through preoperative or peroperative studies, even imaging is useful; the definitive diagnosis depends exclusively on pathologic examination. The surgeon should be prepared for every possibility.