Duplication of the gallbladder is a rare congenital anomaly of the biliary system with the incidence of 1 in 3800. A 38-year-old woman visited our patient clinic for evaluation of wall thickening of the gallbladder, detected by abdominal ultrasonography during a regular medical checkup. Drip infusion cholecystocholangiography-computed tomography revealed Y-shaped duplicated gallbladders.

The patients were classified into two groups: elderly group (aged 70 to 79 years; n=84) and extremely elderly group (aged 80 years or over; n=16). We retrospectively assessed clinicopathological variables, and disease-free as well as overall survival between elderly group and extremely elderly group by univariate analysis. The factors consisted of the following 24 factors: age, gender, coexistence diseases, pathological diagnosis, type of hepatic resection, duration of operation, intraoperative blood loss, intraoperative blood transfusion, in-hospital mortality, postoperative hospital stay, incidence of postoperative complications, tumor factor based on tumor pathology in HCC (American Joint Committee on Cancer/ International Union Against Cancer), liver metastasis grade in CRLM (Japanese classification of colorectal carcinoma), microscopic curability, hepatitis virus status, Child-Pugh classification, retention rate of indocyanine green at 15 minutes (ICG R15 ), tumor differentiation, serum alpha-fetoprotein (AFP), serum carcinoembryonic antigen (CEA), preoperative transcatheter arterial embolization (TAE) and disease-free as well as overall survival. The association of clinicopathologic variables with diseasefree survival after hepatic resection for HCC was assessed by univariate and multivariate analysis.Generally, the extent of hepatic resection was decided based on ICG R15 before surgery and in reference to the hepatic reserve as described by Miyagawa et al. (5). The type of resection was classified as anatomical resection (extended lobectomy, lobectomy, segmentectomy or subsegmentectomy) and non-anatomical limited partial resection.

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