Objective To evaluate the diagnosis and surgical treatment of adult congenital choledochal cyst(ACCC). Methods Clinical data of 345 ACCC cases from 1974 to 2007 were analyzed retrospectively. Results There were only 110 patients (31.9%) with typical triad (abdominal pain, palpable mass and jaundice). B-ultrasound, CT, ERCP, PTC and MRCP were methods for diagnosis. Cancer arising from choledochal cysts was found in 19 cases who had undergone internal drainage and its incidence of cholangiocarcinoma is much higher than in the general population. All cases underwent surgical treatment, in which total excision of choledochal cyst and Roux-en-Y hepaticojejunostomy was main operation, 337 cases recovered well and 8 (2. 3%) died. C..ondusions Accurate diagnosis of ACCC was difficult depending on clinical symptoms only. B-ultrasound was the choice of atraumatic diagnosis. All patients with an established diagnosis of ACCC should undergo exploratory laparotomy. Total excision of eholedochal cyst and Roux-en-Y hepaticojejunostomy is most effective treatment for ACCC.

Objective To evaluate the diagnosis and surgical treatment of primary retroperitoneal extraadrenal pheochromocytoma(PREAP). Methods Clinical data of 17 cases with PREAP from 1976 to 2006 were analyzed retrospectively. Results It was not difficult for the diagnosis of PREAP based on the primary symptoms, including paroxysmal hypertension or persistent hypertension. PREAP is usually deep, large and invading on adjacent organs. B-uhrasound was used for preliminary screening. CT and MRI with high soft tissue resolution and multi directional imaging are of great value for correct diagnosis and determination of exact extent of the tumor in diagnosis of PREAP. 24 h urinary VMA output imcreased in 12 cases (92. 3%) and urinary catecholamine level was up to 526. 1 μg- Precise location of PREAP by 123I-MIBG is superior to that by 131I-MIBG. The diagnosis was tentative in 4 cases and definite in 13 cases. Complete tumor resection was achieved in 15 cases, among them 2 cases died on table due to inadequate preparation before surgery in 1970's. In the remaining 2 cases with huge tumors partial resection, silver clips were put in during operation to locate the extent of the tumors for further management after operation. Conclusions Locating and qualitative diagnosis before operation are valuable and once the patients are diagnosed as PREAP, they should receive exploratory laparotomy after an adequate preparation.

Objective To study the etiology,diagnosis and treatment of xanthogranulomatous cholecystitis (XGC).Methods Clinical data of 78 cases with xanthogranulomatous cholecystitis (confirmed by postoperative pathology) from January 1985 to December 2012 were reviewed retrospectively.Results All 78 cases underwent ultrasonography,50 cases did CT scan.Preoperative diagnosis included chronic calculous cholecystitis in 60 cases,gallbladder carcinoma with cholelithiasis in 8 cases,gallbladder space-occupying lesions in 10 cases.Among those 68 cases of tentative gallstone disease,67 cases were with gallbladder neck incarcerated stones.Surgery were performed in all 78 cases including cholecystectomy in 48 cases,partial cholecystectomy or subtotal resection in 13 eases,cholecystectomy with partial hepatic wedge resection in 12 cases.Intraoperatively 5 cases were misdiagnosed as the carcinoma of the gallbladder and underwent partial liver resection along with cholecystectomy.17 cases underwent choledocholithotomy.2 cases suffered from hepatic duct injury and received Roux-en-Y hepatojejunal anastomosis.Conclusions XGC is a special type of chronic cholecystitis,and accompanied by yellow granuloma formation.Preoperative diagnosis of XGC is often difficult,the definite diagnosis depends on intraoperative fiozen and postoperative paraffin pathology.

Objective To summarize the diagnosis and surgical treatment of hepatic focal nodular hyperplasia (FNH). Methods The clinical data of 63 patients with FNH proved by pathology were analyzed retrospectively. Results The disease mainly affected young to middle aged, 50 cases (79. 4% )were of 31-50 years old. Male and female ratio was 2.94: 1. Fifty-six patients (89%) were asymptomatic, 3 cases were HBsAg positive (4.8%). Liver function was basically normal (92. 1%),5 cases (7.9%) were with elevated level of total bilirubin and rGT. AFP, CEA and CA19-9 was all negative. FNH occured as a single node in 95.2% cases, ranging from 1.5 cm to 17 cm in diameter ( average 4. 5 cm). Of these patients, 25 lesions were present in the left lobe, 29 in the right lobe, 6 in the mid lobe, and 3 in the caudate lobe. A big central artery was found in 2 cases (3. 2% ) as found by color Doppler ultrasound. CT scan showed transient immediate enhancement in 96. 8% (61/63) of patients, with central scar in 6 cases. MRI demonstrated early vigorous enhancement in 93. 7% (59/63) of patients, with central scar in 5 cases. All patients underwent surgical resection; including local resection in 34 cases;segmentectomy or hepatectomy in 13 cases; hemihepatectomy in 13 cases. There was no postoperative mortality and major complications. Conclusions FNH is a kind of hepatic benign disease and characteristic of high preoperative misdiagnosis rate (25. 4% ).

ObjectiveTo summarize our experience on the diagnosis and surgical treatment of hepatocellular adenoma (HCA).MethodsClinical data of 47 HCA cases managed from 1989 to 2009 were analyzed retrospectively. ResultsAll were single lesions.Preoperative correct diagnosis was established in only 7 cases ( 14.9％ ).Tentative malignant space-occupying lesions was diagnosed in other 40 cases (85.1％),including hepatocellular carcinoma in 11 cases,liver hemangioma in 10 cases,liver focal nodular hyperplasia in 14 cases and miscellaneous in the remaining 5 cases.Local resection,segmental hepatectomy,hepatic lobectomy and hemiheptectomy were performed according to the size and location of the lesions.To prevent recurrence or malignant transformation,not less than 1.0 cm safe margin was allowed in all cases.Final diagnosis was made by fast frozen pathology or postoperative pathology.Postoperatively 45 cases were followed up to 6 years without recurrence.ConclusionsPreoperative misdiagnosis of HCA is common.Surgical resection is the only effective treatment,and the prognosis of HCA is favorable.

Objective To explore the diagnosis and treatment of cystic dilatation of the cystic duct in adults.Method Clinical data of 25 cases of the cystic dilatation of cystic duct in adults in 3 hospitals in Songhuajiang river drainage area from 1991 to 2012 confirmed by surgery were analyzed retrospectively.Results The 25 cases were with manifestations of chronic cholecystitis,and 14 patients with right upper quadrant recurrent biliary colic and nausea,vomiting and other gastrointestinal symptoms,9 patients with yellowish discoloration of sclera and skin,and fever.Ultrasonography was done in 25 cases,ERCP in 16 cases and MRCP in 9 cases,displaying liquid dark area of diameter from 1.6 cm × 1.6 cm to 2.5 cm ×2.5 cm in the gallbladder tube suspective of calculi,and characteristic dumbbell shape image.Preoperative diagnosis was cystic duct cyst with stones or gallstones which was confirmed by surgery.Gallbladder and cyst resection was performed in all 25 cases,and bile duct jejunum Roux-en-Y anastomosis was done in 2 of these cases because of introgenic bile duct injury.Conclusions Cysts of the cystic duct is the special type (Ⅵ type) of choledochocele,and its prognosis is good after surgical treatment.

Objective To investigate the diagnosi s and management of inflammatory abdominal mass after appendectomy. Methods Clinical data of 42 patients wit h inflammatory abdominal mass developing after appendectomy from 1972 to 2004 we re retrospectively analyzed. Results There were two kinds of mass: on abdominal wall (26 cases) and that within the abdominal cavity (16 cases). Diagnosis was established on clinical fi ndings and the barium enema examination. Correct preoperative diagnosis was achi eved in 30 cases, with 12 cases (28.6%) misdiagnosed. Laparotomy was performed in 29 cases. Postoperative pathology revealed inflammatory mass. All the 42 case s recovered from the illness. Conclusions Post-appendectomy abdominal mass is infrequent complication. T he clinical course is most often self-limited. However, laparotomy is indicated in patients when conservative therapy fails or there is a fear of malignancy or tuberculosis.

Objective To summarize our experience in the diagnosis and treatment of thyroid Hurthle cell neoplasms. Methods Clinical data of thyroid Hurthle cell neoplasm patients admitted from 1972 to 2003 were analyzed retrospectively. Results The main symptoms were thyroid solitary node or mass (37 cases) and multiple nodule (9 cases). 4 cases had cervical lymph node metastasis. With BUS、CT、ECT and FNAC,only 10 cases were diagnosed as HCNs preoperatively, 36 cases were misdiagnosed as nodular benign single or multiple node. Twenty-eight cases were diagnosed by FNAC and quick freezing pathology. Benign HCNs was treated by isolateral thyroidectomy and malignant HCNs by additional contralateral subtotal thyroidectomy. Eighteen cases were diagnosed by postoperative paraffin pathology, and retrival second operation was performed according to the benignity or malignancy of the thyroid lesion. All cases were followed-up for 2 to 10 years and doing well without recurrence. Conclusions We should realize thyroid Hurthle cell neoplasms fully, if HCNs is suspected intraoperatively, quick freezing pathology is helpful. With appropriate therapy, the prognosis is satisfactory.

Objective To summarize diagnosis and surgical treatment of insulinoma. Methods Clinical data of 64 patients with insulinoma from 1980 to 2006 were analyzed retrospectively. Results All patients had Whipple's triad. Accurate preoperative localization rate of B ultrasonography, CT and enhanced CT, MRI, DSA was 46.9% (30/64), 58.2 %(23/39) and 91.7%(11/12), respectively. Localization rate of intraoperative ultrasonography (IOUS) was 92% (23/25). The tumors were single in 58 cases, and multiple in 6 cases. In the location of single tumor, 19 of them were in the head, 17 in the body, and 22 in the tail;while for multiple tumors, 2 tumors were both located in the body in 4 patient, and 2 tumors were separately located in the body and tail respectively in 2 patients. Treatment Local enucleation was performed in 39 cases, resection of pancreatic body and tail in 13 cases, resection of pancreatic body and tail plus splenectomy in 6 cases, resection of pancreatic tail in 8 cases, resection of pancreatic tail plus splenectomy in 4 cases, laparoscopic resection of insulinoma in 1 case, piecewise resection of pancreas from left to right (blind resection) in 2 cases, pancreaticoduodenectomy in 1 case. The tumor was benign in 62 cases, and malignant in 2 cases. Pancreatic fistula developed after operation in 3 cases, acute pancreatitis in 4 cases, and in these cases, they healed after non-operative treatment. All patients had no symptoms of hypoglycemia after operation. At follow-up visit in 62 cases, 2 case of benign tumor recurred 4 years after operation, and was cured by resection of the pancreas body with tumor, 2 malignant tumors cases, recurred and died of hepatic metastasis in 3 years and 4 years after operation. Conclusions Whipple's triad and IRI/G>0.3 are the bases for qualitative diagnosis of insulinoma. Meticulously palpating the gland combined with IOUS during operation is the most effective method for accurate tumor localization. Resection of insulinoma is the best mode of surgical treatment of insulinoma.

AIM: To investigate the role of N-cadherin in the delamination of neural crest cells. METHODS: The normal expression of N-cadherin in neural tube was identified using in situ hybridization. The cells with N-cadherin over expression were obtained by transfection of wild-type N-cadherin (wt-N-cadherin) ,and the cells with N-cadherin silencing expression were obtained by transfection of dominant-negative N-cadherin (dn-N-cadherin). The migration of cranial neural crest cells was determined by the technique of immunohistochemistry. RESULTS: Either overexpression or down-regulation of N-cadherin significantly affected the migration of cranial neural crest cells. CONCLUSION: Delamination and migration of the cranial neural crest cells rely on the relative N-cadherin expression in the neural tube during neurulation.