Objective To investigate the association between non-Hodgkin lymphoma (NHL) and hepatitis B virus (HBV). Methods The serum HBV markers in 305 NHL patients who were diagnosed in the Affiliated Hospital of Southwest Medical University from January 2014 to December 2016 was detected by automatic chemiluminescence immunoassay. The infection rate of HBV in NHL patients was compared with that in 312 colorectal cancer patients and the national general population (81775 peoples). Results The positive rates of hepatitis B surface antigen (HBsAg), hepatitis B surface antibody (HBsAb) and hepatitis B core antibody (HBcAb) in 305 patients of NHL were compared with the general population [19.0 ％ (58/305) vs. 7.2 ％ (5888/81775), 44.3 ％ (135/305) vs. 50.1 ％ (40969/81775), 45.9 ％ (140/305) vs. 34.1 ％(27885/81775)], and the differences were statistically significant (χ2 values were 63.1, 4.1, 18.8, all P<0.05). The positive rate of HBsAg in NHL patients was compared with colorectal cancer patients and the general population, and the differences were statistically significant (χ2= 65.7, P< 0.01). The positive rate of HBsAg in B-cell NHL was statistically different from T-cell NHL [21.3％(51/239) vs. 10.6％(7/66),χ2=3.869, P<0.05]. But the positive rate of HBcAb and HBsAb in B-cell NHL were compared with T-cell NHL, and there was no statistically significant difference (both P> 0.05). Among 133 NHL patients, the HBV DNA positive rate was 33.1 ％ (44/133), and 74.1 ％ (43/58) in 58 cases of HBsAg-positive NHL, while 4.2 ％ (1/24) in 24 cases of HBsAg-negative but HBcAb-positive NHL. Conclusions The infection rate of HBV in NHL patients is higher than that in colorectal cancer patients and the general population, in which the occult HBV infection is worthy of much attention. The positive rate of HBsAg in T-cell NHL patients is lower than that in B-cell NHL patients. For NHL patients with HBV infection, anti-HBV treatment to prevent reactivation of the virus should be given before the anti-tumor treatment.

Objective To investgate the pathogenesis of PTEN/PI3K/AKT/mTOR signaling pathways in nasal type extranodal NK/T cell lymphoma(ENKTCL-N).Methods The expression of PTEN,p-AKT,p-4EBP1 and p-mTOR in 51 patients with ENKTCL-N and 20 patients with reactive proliferative lymph nodes was detected by immunohistochemistry EnVision.The clinical data were collected and the clinical features,curative effect and prognosis were analyzed retrospectively.Survival analysis was performed by Kaplan-Meier method.Results The positive rate of PTEN in ENKTCL-N patients was lower than that in patients with reactive hyperplastic lymph nodes,and the positive rates of p-AKT and p-4EBP1 were higher than those in patients with reactive hyperplastic lymph nodes,and the difference was statistically significant(P＜0.05);The positive rate of p-mTOR in ENKTCL-N patients was higher than that in patients with reactive hyperplastic lymph nodes,but the difference was not statistically significant (P＞0.05).The survival rate of PTEN-positive patients was higher than that of PTEN-negative patients,and the difference was statistically significant(P＜0.05).Conclusion PTEN/PI3K/AKT/mTOR signaling pathway is abnormally active in ENKTCL-N,which may be related to its pathogenesis;PTEN-positive patients may have better prognosis.

Objective To study the clinical features and prognostic factors of patients with acute paraquat poisoning.Methods The clinical data of 108 patients with acute paraquat poisoning in Affiliated Hospital of Southwest Medical University from June 2013 to June 2015 were collected and followed up for half a year.The clinical features and prognostic factors were analyzed.Results Of 108 patients,about 90.00％ cases were from the rural areas,the married population accounted for 81.48％.Among them,53 people were living,55 cases were dead,and the death rate was 51.00％.The average amount of poison,average hospitalization time,poison to gastric lavage time interval in the survival group were (22.08 ±5.32) mL,(16.5 ± 3.72) d,(2.00 ±0.49) h,respectively,which in the death group were (88.12 ± 14.96) mL,(5.50 ± 1.20) d,(8.56 ± 1.65) h,respectively.The average amount of poison in the death group was far greater than that of the survival group,about 3.6 times,and the average hospitalization time was significantly reduced,only 1/3 of the survival group.The gastric lavage time interval was also lengthened 1.7 times than that of the survival group,the differences were statistically significant (all P ＜ 0.05).The proportions of fever,increased serum creatinine,liver function damage and pulmonary fibrosis in the death group were significantly higher than those in the survival group,the differences were statistically significant (x2 =12.20,8.35,8.84,50.68,all P ＜ 0.05).Conclusion Mortality rates are still high in patients with acute paraquat poisoning.The amount of poison is still the key factor of death in patients.Early gastric lavage and blood purification,as soon as possible to clear the poison,as far as possible to reduce the absorption of the toxic chemical and aggressive treatment can significantly improve the prognosis of patients.Early fever,liver and kidney function damage and pulmonary fibrosis may predict the poor prognosis of patients.