In non-small cell lung cancer( NSCLC),a major characteristic is the abnormal methylation of some certain genes. The hypomethylation of proto-oncogene has the potential to promote carcinogenesis and the formation of neoplasm may also be induced by the hypermethylation of tumor suppressor genes. Meanwhile, the balance between histone acetylation and deacetylation is closely connected to the tumorigenesis. While the histone acetyltransferases can directly acetylate genes related to proliferation,causing cell growth and transfor-mation,histone deacetylase will also alter the level of acetylation of certain proteins,and eventually affect NSCLC. Hence,these abnormal epigenetic modifications play a fundamental role in the formation and develop-ment of NSCLC.

Patellar instability is a common cause of knee pain and a common disease of patellofemoral joint.It is one of the important etiological factors of chondromalacia patella or patellofemoral joint osteoarthritis.This paper investigates the pathological mechanism,sympton,physical examination and photographic of patellar instability.And the results showed that correct diagnosis lead to reasonable treatment.The emphasis of therapy is to restore the balance of soft tissue around palella.Combined orthopedic treatment is commonly used according to different age,different instability degrees,and pathological factors of different patients.

Objective To evaluate the diagnostic value of procalcitonin(PCT),C-reactive protein(CRP),prealbumin(PA)and white blood cell (WBC)count measurements in patients with severe pneumonia.Methods The serum samples of 34 patients with severe pneumonia,68 non-severe pneumonia patients and 40 healthy volunteers were collected.Serum concentrations of PCT,CRP, PA and WBC count of all samples were determined.Results The levels of PCT,CRP,PA and WBC in patients with severe pneu-monia were (24.07±34.77)ng/mL,(98.75 ±69.63)mg/L,(105.65 ±68.88)mg/L,(12.64±7.62)×109/L,which were signifi-cantly higher than those in non-severe pneumonia patients and healthy group(P <0.05).According to ROC analysis,the sensitivity, specificity and Youden index of PCT were 64.7%,77.9%,0.426.Conclusion The level of serum PCT could be used as good bio-marker for severe pneumonia.Detection of PCT,CRP and WBC together plays an important role in the diagnosis of severe pneumo-nia.

Objective To investigate the relationship between suspected ankylosing spondylitis and HLA‐B27 antigen by detec‐ting the positive frequency of HLA‐B27antigen in 872 suspected AS patients ,and evaluate its clinical significance .Methods The positive frequency of HLA‐B27 on the T lymphocyte membrane were detected by flow eytometer in 872 suspected AS patients .Re‐sults Among the 872 suspected AS patients the ratio between male and female was 1 .8∶1 ,the positive rate of antigen HLA‐B27 was 27 .29% ,and the male and female patients′positive rates of HLA‐B27 antigen were 32 .50% and 17 .95% ,respectively (P<0 .05) .The male and female patients′ expression percentage of B27+ /B7- monoclonal antibody were 39 .16 ± 42 .79 and 20 .96 ± 33 .86 ,respectively(P<0 .05) .The male and female patients′mean fluorescence intension of B27+ /B7- monoclonal antibody were 5 .35 ± 5 .44 and 3 .35 ± 3 .87 ,respectively(P<0 .05) .Conclusion The patients with AS are strongly associated with HLA‐B27 an‐tigen .Detection of HLA‐B27 antigen expression intensity in suspected AS patients with FCM is helpful to diagnosis and differential diagnosis of AS .

Objective According to the fine artery anatomy of the lower lip, we developed an innovative partial-thickness myocutaneous flap based on the vascular network of the submucosal and subcutaneous layers of the lower lip.We attempted to treat the secondary bilateral cleft lip deformities using this innovative cross-lip flap.Methods From July 2009 to June 2015, this new technique was used in 98 patients with secondary bilateral cleft lip deformities.The central defects usually occurred in these patients.The defects were reconstructed partially or completely according to the severities of the defects.The operative procedures were as follows: The split flap was elevated from the posterior portion of the oris orbicularis muscle after the inferior labial arteries were divided.Then the partial-thickness flap was rotated 180 degrees horizontally and inverted 180 degrees upward to the upper lip defect.Results All 98 musculomucosal pedicle flaps were viable.The upper lips were reconstructed according to the severities.Conclusions This myocutaneous cross-lip flap with musculomucosal-pedicle has a more reliable blood supply, better flexibility and plasticity.It is an effective method for aesthetic reconstruction for the secondary bilateral cleft lip deformities.

Internet data is introduced into public health arena under the features of fast updating and tremendous volume.Mining and analyzing internet data,researchers can model the internet-based surveillance system to assess the distribution of health-related events.There are two main types of internet-based surveillance systems,i.e.active and passive,which are distinguished by the sources of information.Through passive surveillance system,information is collected from search engine and social media while the active system gathers information through provision of the volunteers.Except for serving as a real-time and convenient complementary approach to traditional disease,food safety and adverse drug reaction surveillance program,Internet-based surveillance system can also play a role in health-related behavior surveillance and policy evaluation.Although several techniques have been applied to filter information,the accuracy of internet-based surveillance system is still bothered by the false positive information.In this article,we have summarized the development and application of internet-based surveillance system in public health to provide reference for a better surveillance program in China.

ObjectiveTo investigate the relationship between Parkinson disease (PD) and intron rs12138592 A/G polymorphism of ubiquitin specific proteases (USP24) gene in Han population of the Western Guangdong province in China. Methods81 PD cases and 100 ethnically matched controls were investigated USP24 gene rs12138592 A/G polymorphism with polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP). ResultsThe incidence of GG genotype was 77.8% in the cases and 62.0% in the controls (χ2=5.213,P=0.022), and the G allele was 88.3% in the cases, 79.5% in the controls (χ2=4.980，P=0.026). ConclusionThe G allele and GG genotype of USP24 gene rs12138592 A/G polymorphism can increase the risk of suffering from PD.

Objective To explore the relation and measures prevention between aspirin and relapsing haemorrhage after operation in cerebral haemorrhage patients. Method It' s a prospective control study. A total of 725 patients with hypertensive basal ganglia cerebral haemorrhage admitted to department of neurosurgery from January 2001 to May 2007 were enrolled. They were diagnosed according to the diagnostic criteria set by the fourth national cerebrovascular disease conference in 1995. Haematoma volume was ＞ 50 mL. All patients were treated with craniotomy. And those with respiration and circulation failure, neurologic function deficit before the onset of the disease,major organ dysfunction, haemorrhagic disease and bleeding tendency or applied medicines affecting coagulation function excepted aspirin were excluded. The patients without use of aspirin before the onset of the disease were operated as the control group(group A), and there were 389 patients in group A.The patients with use of aspirin before the onset of the disease were randomly assigned to group B and C group,and there were 168 patients in group B or group C.The patients in group C received the frozen apheresis platelets. We counted different haematoma volume of relapsing haemorrhage after operation,death rate,ADL scores grades by 6 months follow-up survey in three groups. Quantitative data were expressed as mean ± standard deviation (-x ± s). The data were analyzed by using Chi-square test and Student's t test and rank sum test with SPSS 13.0 statistical package. A P value less than 0.05 indicated statisticals significance. Results Haematoma volume of relapsing haemorrhage was (40.59 + 20. 061 )mL, (53.21 ± 21.260) mL, (40.68 ± 19.517) mL in groups A, B, C,respectively. There was significant difference between group A and group B ( P ＜ 0.01 ), between group B and group C ( P ＜ 0.05), but there was no significant difference between group A and group C(P ＞ 0.05). ADL scores grades at 6-month follow-up was (67.04 ± 26. 176), (54.47 ± 29.403 ), (68.21 ± 25.254) in groups A, B, C, respectively. There was more significant difference between group A and group B, in ADL scores grades and the death rate between group B and group C (P ＜ 0.01), but there was no significant difference between group A and group C (P ＞ 0.05). Conclusions Aspirin can increase the occurrence rate of haemorrhage after operation, disablement and death in cerebral haemorrhage patients, but frozen apheresis platelets can reduce the occurrence rate.

Objective:To systematically review the severe risk in common chronic diseases and coronavirus disease 2019 (COVID-19) cases.Methods:PubMed, Embase, Cochrane Library, China National Knowledge Infrastructure, Wanfang Database, China Biology Medicine disc, medRxiv, SSRN and ChinaXiv were searched for clinical and epidemiological studies that reported chronic diseases in patients with COVID-19. Only studies of severe COVID-19 in comparison with non-severe controls were included. The prevalence rates of chronic diseases including chronic obstructive pulmonary disease (COPD), diabetes mellitus, hypertension, malignant tumor, cardiovascular diseases, cerebrovascular disease, chronic kidney disease, and chronic liver disease were estimated. Pooled odds ratio ( OR) with 95% confidence interval ( CI) between patients with severe COVID-19 and non-severe groups were calculated. R 3.6.3 software was used for meta-analysis. Results:The search yielded 2 455 articles. A total of 19 eligible comparative studies with 4 792 patients were included in a quantitative analysis. Meta-analysis showed that there was a proportion of 55.0% (95% CI 40.0%-80.0%) male among patients with COVID-19, and the overall pooled prevalence of any chronic diseases in COVID-19 cases was 30.4% (95% CI 24.0%-37.0%). The most prevalent comorbidity was hypertension (16.9%(95% CI 14.0%-20.0%)), followed by diabetes mellitus (8.3%(95% CI 8.0%-9.0%)). The proportion of male patients with severe COVID-19 was higher than that of male patients with non-severe COVID-19 (64.4% vs 52.8%, OR=1.49, 95% CI 1.08-2.05, Z=4.63, P<0.01). The prevalence rates of COPD, cerebrovascular disease, diabetes mellitus, chronic kidney disease, hypertension, cardiovascular diseases and malignant tumor in severe COVID-19 patients were higher than those of non-severe patients ( OR=5.77, 95% CI 3.80-8.74; OR=4.47, 95% CI 2.71-7.38; OR=3.55, 95% CI 2.86-4.40; OR=3.05, 95% CI=1.76-5.28; OR=2.82, 95% CI=1.96-3.97; OR=2.39, 95% CI=1.77-3.23; OR=2.15, 95% CI 1.27-3.66, respectively, Z=8.37, 6.01, 11.60, 4.20, 5.46, 5.71, 3.12, all P<0.01). There was no significant difference in the prevalence of chronic liver disease between severe and non-severe patients ( OR=1.35, 95% CI 0.84-2.17, P=0.11). Conclusion:COVID-19 patients with chronic diseases have higher risk of developing severe disease, and the ORs from high to low are COPD, cerebrovascular disease, diabetes mellitus, chronic kidney disease, hypertension, cardiovascular diseases and malignant tumor.

The process of burn wounds healing includes the removal of necrotic tissue, the hyperplasia of granulation tissue and epithelialization. The removal of necrotic tissue is the first step in dealing with burn wounds. Although there are a variety of adjuvant drugs for removing necrotic tissue, surgical debridement is still the main way of debridement of burn wounds. Surgical debridement of burn wounds includes escharectomy, tangential excision and dermabrasion. Escharectomy and tangential excision have been widely used in clinical practice, while dermabrasion has not been known to the majority of burns colleagues. This article summarizes the clinical application and progress of dermabrasion in burn wounds.