Objective:To study the ultrastructural changes of the junctional epithelial after dental preparation. Methods: Junctional epithelium (JE) of left premaxillary teeth was detached by diamond bur in 8 rabbits (group 1) and by surgical knife in another 8 rabbits (group 2). JE of the right teeth without treatment was used as the controls. 4 animals in each group were sacrificed 1 and 2 weeks after operation respectively.Samples were prepared for transmission electron microscope observation.Results: In the two tested groups reattachment was observed 2 weeks after operation,degeneration of mitochondria in JE cells and destruction of basement membrane were observed. No significant difference was observed between group 1 and group 2.Conclusion: Dental preparation may result in ultrastructural changes of JE cells.

Bronchoscopy is a minimally invasive method for obtaining peripheral pulmonary lesions (PPL). Traditional bronchoscopy-guided transbronchial lung biopsy (TBLB) is performed under X-ray guidance, and diagnostic rate is relatively low. A new, real-time electromagnetic navigation bronchoscopy (ENB) is a minimally invasive diagnostic technique which appeared in recent years. Studies suggest ENB is a feasible and safe method for diagnosis of PPL which shows higher diagnostic yields than traditional TBLB, and its potential application in localization and treatment of PPL. This article reviews the clinical application of the technique.

The network-based course is a teaching resource based on modern multimedia technology and network-based teaching environment.In order to improve the quality of teaching,we designed and developed the physiology interactive learning website,including online class,study column,online test and network resource database.The teaching practice indicates teaching by the website has many merits such as rich content,giving prominence to emphasis,combination of word and picture and good mutuality.

Objective To evaluate the diagnostic value of endobronchial ultrasound-guided transbronchial needle biopsy (EBUS-TBNA) in intrathoracic tuberculosis(TB).Methods We retrospectively analyzed patients underwent EBUS-TBNA with a final diagnosis of intrathoracic TB at Shanghai Chest Hospital from October 2009 to March 2013 and observed that the diagnostic efficacy by pathology and microbiology and safety of EBUS-TBNA for intrathoracic TB.Results 75 patients were diagnosed with pulmonary TB or intrathoracic tuberculous lymphadenitis,and accuracy was 80％ (60/75) by EBUS TBNA.A total of 60 patients had pathology,acid-fast bacilli(AFB) staining and mycobacterial culture test results,of whom 52 (86.67％)were diagnosed.Pathological findings were consistent with TB in 77.33％ patients (58/75),in 20.31％ (13/64) the smear were positive for AFB and in 46.67％ (28/60) were positive for cuhure.One hundred and twenty-nine mediastinal or hilar lymph nodes and 10 intrapulmonary lesions were biopsied in 75 patients,the average target number of per patient were 1.85.Pathological findings were consistent with TB in 66.19％ samples(92/139),in 13.91％ (16/115) were positive for AFB and in 38.32％ (41/107) were positive for culture.Multivariate regression revealed that short-axis diameter was an independent risk factor associated with positive pathology,smear and euhure.Additionally,more aspiration times cause higher pathology positive rate,pathology showing necrosis and positive smear were independent risk factors associated with positive cuhure.There were two patients occurred complications during operation.Conclusion EBUS-TBNA was a safe and effective method for the diagnosis of intrathoracic tuberculosis.

BACKGROUND AND OBJECTIVEThe aim of this study is to evaluate diagnostic yield and the safety of endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) in the diagnosis ofbronchogenic carcinoma.

METHODSBetween July, 2009 and February, 2010, 95 patients with mediastinal/hilar lymphadenopathy and/or intrathoracic peritracheal or peribronchial masses previously detected with CT scan underwent EBUS-TBNA. No rapid onsite cytology was performed.

RESULTSIn all 95 patients, 60 cases were newly diagnosed lung cancer through the pathological examination and clinical follow-up certification. In 60 lung cancer cases, 112 samples were obtained from lymph nodes (LNs) and 11 samples were obtained from intrapulmonary lesions. Fifty-eight cases of patients were diagnosed, false negative in 2 cases. Sensitivity and specificity of EBUS-guided TBNA method in distinguishing benign from malignant LNs or thoracic masses were 96.67% and 100%, respectively. There was any major complication in this series, the procedure was uneventful.

CONCLUSIONEBUSTBNA seemed a safe and effective technique in making bronchogenic carcinoma diagnosis for mediastinal/hilar LNs and intra-pulmonary masses.

Adult ; Aged ; Aged, 80 and over ; Biopsy, Fine-Needle ; methods ; Bronchi ; diagnostic imaging ; pathology ; Carcinoma, Bronchogenic ; diagnosis ; Endosonography ; methods ; Female ; Humans ; Lung Neoplasms ; diagnosis ; Male ; Middle Aged

Objective:To investigate the value of growth differentiation factor-15 (GDF-15) and extravascular lung water index (EVLWI) in severity grading and prognosis prediction of patients with acute respiratory distress syndrome (ARDS).Methods:Patients with ARDS aged 18-75 years admitted to the department of respiratory intensive care unit (RICU) of Zhengzhou Central Hospital Affiliated to Zhengzhou University from January 2019 to February 2020 were enrolled. All patients were treated with conventional therapies such as mechanical ventilation, anti-infection, stabilization of water, electrolytes and acid-base environment, blood purification and nutritional support according to their conditions. Besides, the pulse-indicated continuous cardiac output (PiCCO) was performed after admission to the department, and EVLWI before treatment and at 24, 48 and 72 hours of treatment were recorded. Serum GDF-15 level was measured by enzyme linked immunosorbent assay (ELISA) during the same period. Patients were classified as mild, moderate, and severe degree according to the 2012 Berlin Definition of ARDS, and EVLWI and GDF-15 levels in patients with different disease levels before and after treatment were compared. In addition, the length of intensive care unit (ICU) stay, ICU mortality, and 28-day mortality of patients with different GDF-15 or EVLWI levels were analyzed comparatively, with the GDF-15 3 458 ng/L and EVLWI 15 mL/kg as the cut point.Results:A total of 82 patients with ARDS were enrolled, including 22 patients with mild ARDS, 28 patients with moderate ARDS, and 32 patients with severe ARDS. The GDF-15 and EVLWI levels in patients with moderate and severe ARDS at each time point before and after treatment were higher than those in patients with mild ARDS. Both GDF-15 and EVLWI levels in patients with severe ARDS were higher than those in the patients with moderate ARDS. The differences were statistically significant at all the time points except for the difference of GDF-15 levels at 24 hours after treatment (ng/L: 3 900.41±546.43 vs. 3 695.66±604.73, P > 0.05). [GDF-15 (ng/L): 3 786.11±441.45 vs. 3 106.83±605.09 before treatment, 3 895.48±558.96 vs. 3 333.29±559.66 at 48 hours, 3 397.33±539.56 vs. 3 047.53±499.57 at 72 hours; EVLWI (mL/kg): 19.06±1.91 vs. 14.31±1.50 before treatment, 18.56±2.23 vs. 13.26±1.69 at 24 hours, 17.23±1.76 vs. 12.45±1.36 at 48 hours, 15.47±1.81 vs. 11.13±2.19 at 72 hours, all P < 0.05]. According to the cut-off value, there were 23 patients with GDF-15 ≥ 3 458 ng/L and GDF-15 < 3 458 ng/L respectively and there were 23 patients with EVLWI ≥ 15 mL/kg and EVLWI < 15 mL/kg respectively. The length of ICU stay and 28-day mortality in patients with high GDF-15 were significantly higher than those in patients with low GDF-15 [length of ICU stay (days): 21.22±2.69 vs. 15.37±3.14, 28-day mortality: 56.5% vs. 21.7%, both P < 0.05]. The length of ICU stay and 28-day mortality in patients with high EVLWI were also significantly higher than those in patients with low EVLWI [length of ICU stay (days): 18.45±2.61 vs. 14.98±2.75, 28-day mortality: 47.8% vs. 17.4%, both P < 0.05]. Conclusion:To some extent, GDF-15 and EVLWI levels reflect the severity of patients with ARDS, and high GDF-15 and EVLWI levels are significantly associated with poor prognosis in patients with ARDS.

OBJECTIVE：To establish the rapid field identification method of Cryptotympana pustulata ecdysis. METHODS ： 3D depth of field synthesis technology was used to identify 50 batches of C. pustulata ecdysis and its adulterants from the length of beak ，size and protrusion degree of upper labial base ，the protrusion degree of the lower labial base ecdysis and the color of its upper transverse groove ，the number and shape of main and lateral spines on the foot ，significance of abdominal valves ，the number of webs ，the number and shape of side plates ，the number of tergum rings ，terminaliae，etc. RESULTS ：Among 50 batches of samples ，S1-S5，S26-S30，S36-S50 were C. pustulata ecdysis；S21-S25 was adulterants of C. pustulata ecdysis after weight gain ；S31-S35 was adulterants of C. pustulata ecdysis after extraction ；S6-S20 were ecdysis from Tibicen flammatus ，C. flammatta，Lyristes pekinensis ，all of which were adulterants. The main distinguishing feature of C. pustulata ecdysis and its adulterants was that abdomen and ventral surface of C. pustulata ecdysis were triangular ，and the abdomen and ventral surface of other species was nearly parallel ；the valve of C. flammatta ecdysis was obvious ，but those of other varieties were not obvious ；the lateral appearance of terminaliae of C. flammatta ecdysis was sharper than those of other species ；there was an acute angle between the front foot accessory thorns and the end thorns of the T. flammatus ecdysis，and an obtuse angle between the front foot accessory thorns and the end thorns of the L. pekinensis ecdysis. CONCLUSIONS ：The method is simple ，reliable and suitable for rapid field identification of C. pustulata ecdysis and its adulterants.

Non-small cell lung cancer (NSCLC) is the most common pathological type of lung cancer, most NSCLC patients are at advanced stage at the time of diagnosis. For patients without sensitive driven-oncogene mutations, chemotherapy is still the main treatment at present, the overall prognosis is poor. Improving outcomes and obtaining long-term survival are the most urgent needs of patients with advanced NSCLC. In recent years, immunotherapy has developed rapidly. Immune checkpoint inhibitors (ICIs), especially targeting programmed death-1 (PD-1)/programmed death-ligand 1 (PD-L1), have made a breakthrough in the treatment of NSCLC, beneficial to patients' survival and changed the treatment pattern for NSCLC. It shows more and more important role in the treatment of NSCLC. Led by NSCLC expert committee of Chinese society of clinical oncology (CSCO), relevant experts in this field were organized. On the basis of referring to domestic and foreign literature, systematically evaluating the results of Chinese and foreign clinical trials, and combining the experiences of the experts, the experts group reached an agreement to develop this consensus. It will guide domestic counterparts for better application of ICIs to treat NSCLC.

Non-small cell lung cancer (NSCLC) is the most common pathological type of lung cancer. The systemic antitumor therapy of advanced NSCLC has undergone renovations of chemotherapy, targeted therapy and immunotherapy, which results in greatly improved survival for patients with advanced NSCLC. Immune checkpoint inhibitors (ICIs), especially targeting programmed cell death protein 1 (PD-1)/programmed death-ligand 1 (PD-L1), has changed the treatment paradigm of NSCLC. ICIs have become the standard treatment for advanced NSCLC without epidermal growth factor receptor(EGFR) mutation or anaplastic lymphomakinase(ALK) translocation in the first- or second-line setting, and for locally advanced NSCLC following concurrent radiotherapy and chemotherapy. ICIs are also promising in adjuvant/neoadjuvant therapy. More and more ICIs have been approved domestically for the treatment of NSCLC. Led by the NSCLC expert committee of Chinese Society of Clinical Oncology (CSCO), this consensus was developed and updated based on thoroughly reviewing domestic and foreign literatures, clinical trial data, systematic reviews, experts' discussion and the consensus(2019 version). This consensus will aid domestic clinicians in the treatment of NSCLC with ICIs.
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