Objective: To explore the pathogenesis of oral lichen planus (OLP) by examining the expressions of hypoxia-inducible factor-la and RTP801 in OLP. Methods: To determine the expression levels of HIF-la and RTP801 in 24 OLP tissues and 12 normal oral mucosa tissues by real-time fluorescence quantitative PCR. Results; The expression of HIF-1α in OLP was higher than that in normal oral mucosa(P <0.05), while the expression of RTP801 in OLP was lower than that in normal oral mucosa( P <0.05). Conclusion; The abnormal expressions of HIF-la and RTP801 may play an important role in the pathogenesis of oral lichen planus. HIF-1α might be a potential molecular target for the treatment of OLP.

Objective To evaluate the safety of laparoscopic resection for giant abdominal benign mass.Methods Six cases of giant abdominal benign mass(8～25 in diameter)underwent laparoscopic exploration and resection under general anesthesia from July 2005 to March 2006.Results The laparoscopic resection was accomplished in all the 6 cases.The operation time was 75～220 min(mean,135 min),the intraoperative hemorrhage volume was 20～100 ml(mean,55 ml),the duration for abdominal drainage was 1～3 d(mean,2 d),and the postoperative hospital stay,2～7 d(mean,4.3 d).There was no complications such as intestinal injury,postoperative bleeding,or abdominal infection.Follow-up visits for 1～9 months(mean,6.5 months)found no recurrence.Conclusions Laparoscopic resection of giant abdominal benign mass is a feasible and safe minimally invasive technique.

Objective To study the safety of laparoscopic total mesorectal excision for middle and lower rectal cancer.Methods A retrospective comparison was made between 52 cases of open total mesorectal excision from December 2002 to December 2005(Open Group) and 49 cases of laparoscopic mesorectal excision from January 2003 to June 2006(Laparoscopic Group).Results There was no difference in baseline parameters between the two groups.As compared with the Open Group,the Laparoscopic Group presented less blood loss [for anterior resection: 160?106 ml(n=37) vs 298?186 ml(n=36),t=-3.908,P=0.000;for abdominoperineal resection: 180?153 ml(n=10) vs 356?170 ml(n=14),t=-2.604,P=0.016].The recovery time of bowel functions was shorter in the Laparoscopic Group than in the Open Group(2.4?1.8 d vs 3.6?1.5 d;t=-3.648,P=0.000).The overall complication rate in the Laparoscopic Group(14.3%,7/49) was lower than that in the Open Group(44.2%,23/52)(?2=10.834,P=0.001).No significant difference was seen between the two groups in the number of lymph node resected(12.7?6.5 vs 13.6?7.0;t=-0.668,P=0.505),with negative margins in both groups.Follow-up observations were carried out in 45 cases in the Laparoscopic Group(91.8%) for 2～42 months and in 47 cases in the Open Group(90.4%) for 6～42 months,respectively.The local recurrence rate was respectively 4.4% in the Laparoscopic Group(2/45) and 4.3% in the Open Group(2/47). Conclusions Laparoscopic total mesorectal excision for middle and lower rectal cancer is safe and feasible.

0.05).Conclusions Laparoscopic resection of colorectal carcinoma is feasible and safe for elderly patients.The method can reduce the rate of postoperative complications.

Objective To study the feasibility of laparoscopic radical gastrectomy.Methods From August 2006 to May 2007,31 patients with gastric cancer received laparoscopic radical gastrectomy(radical distal gastrectomy in 26 cases and radical total gastrectomy in 5).Results Among the cases,1 was converted to an open surgery,2 were treated completely by laparoscopic radical gastrectomy;and in the other 28 cases,the radical gastrectomy was performed under the assistance of laparoscopy.Lymph node dissection of D1+? was performed on 2 patients and D2/D2+ was adopted in the other 29.One case was done in combination with partial liver dissection.The median operative time was 5 h(range 4.5-7 h).The median blood loss was 150 ml(range,100-600 ml).One patient received blood transfusion during the operation.Intraoperative spleen injury occurred in one case.The median number of harvested lymph nodes was 20(range,14-33).No patient died after the surgery.The median time for gastrointestinal function recovery was 4 d(range 3-6 d).One patient developed gastroparalysis after the operation and was cured by conservative therapy.One of the patients had bleeding of the jejunal pouch after total gastrectomy.And one showed subluxation of the articulatio cricothyroideus.No anastomotic leakage and lung infection occurred after the surgery.And no recurrence or metastasis was found during a 2-to 8-month follow-up(median,5).Conclusion Laparoscopic radical gastrectomy is feasible and safe.

Objective To investigate the relationship between dose and trough blood concentration of tacrolimus after orthotopic liver transplantation and the changes of time-dependent concentration. Methods The doses and trough blood concentrations of tacrolimus from 20 patients who survived longer than 1 year were summarized retrospectively.Results The initial oral doses of 0.15 mg?kg -1?d -1 as suggested by most surgeons led to 53.4 % of the measured whole blood concentrations in the first postoperative week were higher than 15 ?g/L, 23.3 % of them within 10 ?g/L to 15 ?g/L and 23.3 % of them lower than 10 ?g/L. The ratio of trough concentration/dose was increased gradually after transplantation and reached its peak at the second postoperative month, which was higher than those in the following month 3, 4, 5, 6, 7, 8 and 11 significantly (all P

Objective To investigate the effect of liver transplantation on hepatitis B associated diseases and the efficiency of prevention and treatment on the re-infection of hepatitis B.Methods The data of 17 patients undergoing liver transplantation were analyzed after treatment of lamivudine and hepatitis B immune globulin (HBIg). Results Of the 17 cases of hepatitis B pretransplantation, 2 cases were positive for HBsAg. Liver function was normal in all patients.Conclusions Liver transplantation is an effective therapy for hepatitis B. Lamivudine and HBIg could effectively prevent and treat the re-infection of hepatitis B after liver transplantation.

Objective To analyze perioperative process, oncologic state and prognosis of patients with rectal carcinoma treated by lapascopic abdominoperineal resection. Methods 9 cases of rectal carcinoma treated by lapascopic abdominoperineal resection were reviewed retrospectively from December 1993 to February 1996. Results The median age was 50y(30y～67y), median follow-up time 80 months(40m～90m) and median operative time 6h (4 5h～7 5h). 9 cases were operated on by standard radical operation, including abdominal procedures under laparoscope in 8 cases and under the help of mini-incision in 1 case.Complications occurred in 4 cases, including subcutaneous emphysema and urine detention, iliac vein injury, deep vein thrombosis and part mucous necrosis, and perineal wound infection in 1 case respectively. The median number of lymph nodes in the specimen was 13(4～25). 6 patients survived and 3 ones died with the survival rate at 5-year being 77.8%. Conclusions Lapascopic abdominoperineal resection in the treatment of rectal carcinoma is feasible, and it can meet the tumor resection requirements of open radical operation.

Objective To study the application of the selective regional anemia hepatectomy. Methods The hepatic veins and hilar plates of 5 liver samples of posthepatitic cirrhosis were measured. Results Out of the 5 samples, the average width and depth of the left branch of hilar plate were 1.78cm and 0.82cm, of the left medial branch were 1.04cm and 1.02cm, of the left lateral superior branch were 0.96cm and 0.74cm, of the left lateral inferior branch were 1.02cm and 0.76cm, of the right branch were 2.02 cm and 1.28cm, of the right posterior branch were 1.20cm and 1.10cm, and of the right anterior branch, 1.22cm and 1.16cm. The average width and depth of the left hepatic vein were 0.82cm and 0.74cm, of the right hepatic vein were 1.16cm and 1.04cm, and of the middle hepatic vein, 0.92cm and 1.18cm. The regional anemia hepatectomy was performed successfully in 2 cases. Conclusions Selective occlusion of the blood flow in and out the hepatic segment or lobe may contribute to a safe and reliable hepatectomy.

Objective To compare effects of laparoscopic versus open anterior resection of rectal carcinoma on immune functions.Methods A total of 38 patients were given either laparoscopic(18 patients) or open(20 patients) anterior resection of rectal carcinoma from April 2004 to June 2005 in this department.The percentages of T-lymphocytes(CD_3,CD_4,and CD_8) and natural killer cells were calculated by using the flowcytometry.The levels of immunoglobins(IgG,IgA,and IgM) and complements(C_3 and C_4) were detected by using the immunonephelometry.Results In levels of T-lymphocytes,immunoglobins,and complements,there were no statistically significant differences between open and laparoscopic groups 24 and 96 hours after operation.In levels of natural killer cells,no differences were observed in laparoscopic group before and after operation(24 and 96 postoperative hours) while a significant decrease were found in open group after operation.Conclusions As compared with open surgery,laparoscopic anterior resection of rectal carcinoma has less influence on natural killer cells.