Objective To investigate effects of complete resection of the cyst or incomplete resection with 3 ～ 5 mm remnant proximal cyst wall in treating adult type Ⅰ choledochal cyst (CC).Methods Medical records of 133 surgical patients with type Ⅰ CC from December 1995 to December 2017 in the First Affiliated Hospital of Zhengzhou University were reviewed retrospectively.According to whether to reserve the 3 ～ 5 mm cyst wall in proximal end of cyst,133 patients were divided into unreserved group (n =85) and reserved group (n=48),and the related indicators of the two groups were compared and analyzed.Results No significant difference was observed in age,sex ratio,clinical performance between the two groups(all P＞0.05).And there was no statistical difference in the operation time,intraoperative blood loss,and biliary-intestinal anastomosis diameter between the two groups(all P＞0.05).The main complications of the two groups were similar,including incision and abdominal infection,bile leakage,cholangitis,reflux cholangitis,bile duct stones and anastomotic stricture,and there was no statistical difference in the incidence of each complication.Biliary-intestinal anatomical site malignancy was observed in one patient with recurrent cholangitis in the reserved group in the 33th months.Conclusions There was no statistical difference in the incidence of early and late complications in two different methods of cyst management for treating adult type Ⅰ CC.Whether reserve the 3～5 mm cyst wall in proximal end of CC increases the risk of cancer still needs further studies.

Objective To study the clinical features of xanthogranulomatous cholecystitis (XGC),and to analyze the difficulties in the differential diagnosis of XGC with gallbladder carcinoma.Methods The clinical data of 42 patients who were diagnosed preoperatively as gallbladder cancer in our hospital from 2008 to 2016 were retrospectively analyzed.Results Of the 42 patients,upper abdominal CT scans were carried out in 38 patients,and MRI examination in 4 patients.Imaging findings showed unclear boundaries between the liver and the gallbladder in 37 patients,and unclear boundaries between the gallbladder and the adjacent tissues in 16 patients.In 11 patients,the regional lymph nodes were enlarged.22 patients had gallstones.All the 42 patients had gallbladder wall thickness of ≥3 mm.In 27 patients there were diffuse thickenings of the gallbladder wall,while in 15 patients there were only local thickenings.In 35 patients,inhomogeneous enhancement of the gallbladder wall was shown on CT enhancement scanning,and in 11 patients,there were low attenuation nodules in the gallbladder wall.All the 42 patients underwent surgical treatment.During surgery,dissection of the gallbladder triangle was difficult because of dense adhesion of the gallbladder with the surrounding tissues.In 32 patients,the gallbladder was adherent to the omentum,in 16 patients to the duodenum,in 12 patients to the colon,and in 8 patients to the stomach.In 30 patients,intraoperative frozen sections were carried out.Two patients were diagnosed to have early gallbladder cancer (T1a GBC).In 12 patients who did not receive frozen section during operation,6 patients were subsequently diagnosed to have XGC and 6 patients to have gallbladder cancer.The types of surgical treatment given to these patients were according to the intraoperative diagnosis or frozen sections results.After surgery,one patient each developed surgical site infection in the total cholecystectomy group as well as in the partial cholecystectomy group.In addition,one patient had bile duct injury and another patient had duodenal injury in the total cholecystectomy group.There was one patient who had residual biliary stone in the partial cholecystectomy group.The difference in the postoperative complication rates between the two groups was not significant (P ＞ 0.05).Conclusions It is difficult to differentiate XGC from gallbladder cancer based on clinical and imaging findings.The final diagnosis still depends on histopathological examination.