Cellular senescence is an extremely stable form of cell cycle arrest and can be induced by DNA damage as well as oncogene activation. Oncogene-induced senescence is considered as an important barrier against the development of cancer.Several recent reports found that oncogene-induced senescence occurs in the early stages of cancer development.A large number of cells enter senescence in premalignant neoplastic lesions but much less cells do so in malignant tunors.So, senescence is a significant characteristic of premalignant tumor cells, therefore may have important diagnostic and/or prognostic values for management of cancer.

AIM: To investigate the protective effects of the total paeony glycoside(TPG) on the focal cerebral ischemia and regional cerebral blood flow(rCBF) in rats. METHOD: The rat model of focal cerebral ischemia was made by middle cerebral artery occlusion(MCAO) with nylon suture.TPG was injected into every group rats once a day before 48 h,and injected before MCAO 30 min and after 4 h,12 h.After 24 h the effects of the drug were studied about neurological deficit,the water content of brain tissue,the cerebral infarcted zone,under microscopic examination,as well as rCBF on each rat with laser Doppler fiowmeter(LDF). RESULTS: The sympton of brain ischemia was obvious in model rats by contrast to the sham rats,and the model rats rCBF decreased markedly after MCAO.50 mg/kg and 100 mg/kg TPG injection could obviously promote neurological deficit,decrease the water content of brain tissue and the cerebral infarcted zone.And the pathological slices also proved its protective effect on neuron.The laser Doppler flowmeter detected result indicated that 100 mg/kg TPG inject could greatly increase MCAO rats rCBF. CONCLUSIONS: TPG injection has a marked prospective activity on rat focal brain ischemia in rats,and the increase of rCBF may be one of the protection mechanism.

Objective To assess the role of promyelocytic leukemia protein (PML)and P53 in the progression of esophageal squamous cell carcinoma(ESCC)and its precursor lesions. Methods Different expression patterns of PML and P53 of 241 cases of ESCC combined with adjacent precursors were analyzed by tissue array and immunohistochemistry and correlated with clinicopathological parameters. Results In ESCC and its precursor lesions, PML and P53 displayed positive or strong positive, while in normal esophageal epithelia, these proteins showednegative or stained positive only in parabasal cell layer. The expression level of PML was correlated with the depth of invasion of esophageal carcinomas (X2=29.461,P<0.001),lymph metastasis status(X2=15.226,P<0.001)and pTNMs(x2=26.956,P

Objective To analyze and summarize the imaging features of hepatic epithelioid hemangioendothelioma (EHE).Methods The retrospective and descriptive study was conducted.The clinicopathological data of 9 patients with EHE who were admitted to the Cancer Hospital of Chinese Academy of Medical Sciences between June 2012 and June 2016 were collected.Patients underwent computed tomography (CT) and magnetic resonance imaging (MRI) examinations.Number,size,location,shape,density or signal and enhancement method of lesions,with or without lesions fusion and relationship between lesions and vessels were analyzed by 2 imaging doctors.Lesions in left lobe of liver,right lobe of liver and caudate lobe of liver were respectively counted.Real number was a standard as less than 5 lesions and more than or equal to 5 lesions was represented as ≥ 5.Observation indicators:(1) overall imaging features of EHE;(2) MRI findings of EHE;(3) CT findings of EHE;(4) treatment and pathological features of EHE and results of follow-up.Patients received the corresponding treatment after imaging examinations.Follow-up using outpatient imaging examinations was performed to detect tumor recurrence and stable condition of patients up to December 2016.Results (1) Overall imaging features of EHE:of 9 patients with EHE,6 received plain and enhanced scans of MRI,3 received plain and enhanced scans of CT (1 combined with MRI),1 received enhanced scan of CT.Lesions in right lobe of liver were more than that in left lobe of liver,and there were fewest lesions in caudate lobe of liver.Lesions were round or similar-round shape,with a maximum diameter of 2.5-6.1 cm and an average diameter of 3.6 cm.Four patients had total 2-5 lesions and less than 5 lesions in each lobe of liver,without lesions fusion,including 1 with halo sign and capsule retraction sign and 1 with halo sign.Of other 5 patients,2 had more than or equal to 5 lesions in each lobe of liver and 3 had more than or equal to 5 lesions in 2 lobes of liver;4 had halo sign,lollipop sign,capsule retraction sign and a tendency of lesions fusion,1 had halo sign and capsule retraction sign.The halo sign,lollipop sign,capsule retraction sign and a tendency of lesions fusion were 7/9,4/9,6/9 and 4/9 in 9 patients,respectively.(2) MRI findings of EHE:6 patients received plain and enhanced scans of MRI.① Four patients had clearhalo sign on T2 weighted imaging (T2WI),in portal vein phase and hepatobiliary phase.Three patients had slightly central hyperintensity and thick ring of slightly peripheral hyperintensity on T2WI.There were slightly central hyperintensity and thin ring of slightly peripheral hypointensity in 1 patient,and the halo sign was seen by enhanced scan.There were central hyperintensity and peripheral hypointensity in 2 patients,and the halo signs were clearly seen in hepatobiliary phase.Some patients were combined with multiple manifestations.② There were no obvious halo sign on T2WI,annular enhancement in arterial phase by enhanced scan,no obvious halo sign in portal vein phase and hepatobiliary phase in 2 patients.There were hypointensity on T1WI and isointensity-hyperintensity on DWI in 6 patients.(3) CT findings of EHE:plain scan of CT in 4 patients showed slightly hypodense shadow,without calcification.Enhanced scan of CT in 3 patients showed that obvious halo-like enhancement was seen in portal vein phase and halo rings were less obvious than that by MRI examination.(4) Treatment and pathological features of EHE and results of follow-up:of 9 patients with EHE,4 underwent surgical resection based on lesions ≤5 and surgical specimens were detected by pathological examination,5 underwent interventional treatment and pathologic examination with biopsy.Gross specimen examination showed that lesions were solid and stiff,with greyish white section plane and infiltrative margin.Tumor cells consisted of epithelioid cells under the microscopy,without atypia and with rare mitotic figures,and vacuoles were seen in cytoplasm.Immunohistochemistry showed CD31 and CD34 were positive.Nine patients were followed up for 6-54 months.During the follow-up,4 patients with surgery had no recurrence and 5 patients with interventional therapy remained stable condition.Conclusions Imaging manifestations of hepatic EHE are the more typical when lesions of EHE became more.Hepatic EHE has a tendency of lesion fusion,halo sign,capsule retraction sign and lollipop sign.Imaging manifestations on T2WI with fat suppression,in portal vein phase and hepatobiliary phase are helpful to improve the diagnosis of hepatic EHE.

Objective To evaluate the risk of locoregional recurrence (LRR) and the influencing factors for long-term survival in patients with epithelial-myoepithelial carcinoma (EMCa).Methods A retrospective analysis was performed for 18 EMCa patients, who received initial therapy or initial adjuvant therapy in our hospital from 1999 to 2015, to investigate their survival.Among these patients, 8(44%) underwent surgery alone, 9(50%) received adjuvant radiotherapy, and 1(6%) received radical concurrent chemoradiotherapy.Locoregional recurrence-free survival (LRFS) and overall survival (OS) rates were compared between these groups.The Kaplan-Meier mtthod was used to calculated survival rates and log-rank test was used to compare the LRFS.Results With a median follow-up time of 46 months, 5 patients developed LRR, and the 5-year LRFS and OS rates were 69% and 93%, respectively.The patients treated with radiotherapy had a significantly higher 5-year LRRFS rate than those not treated with radiotherapy (71% vs.57%, P=0.569).Conclusions LRR is the main failure mode of EMCa treatment, and further improving local control is the key to improved survival.

Objective:Based on 108, 591 cases of pediatric emergency visits in a Level Ⅲ Grade A women and children′s hospital in Guangzhou area, we analyze the disease spectrum and epidemiological characteristics, and summarize the characteristics of patient flow changes.These investigations will provide an basis for scientific decision-making for manpower and material resource management of pediatric emergency and hospital workflow design.Methods:The children admitted to the Pediatric Emergency Department of the Zhujiang New Town District of Guangzhou Women and Children′s Medical Center from October 2016 to September 2018, including night emergency and inpatient observations, were analyzed according to the admission date, admission time, gender, age, initial diagnosis and etc.Results:There were more boys than girls in the emergency department, whose ratio was 1.46∶1 (64 480∶44 111 cases). The age of children ranged from 0 to 17 years old, with a median of 11 (23, 48) months.The age distribution was mainly under 5 years old, accounting for 84.14% (91 336/108 591). During the whole year, the number of children in July was the most, accounting for 10.53% (11 433/108 591), and the children in February were the least, accounting for 6.04% (6 555/108 591). The highest visit time of the whole day was 22-23 pm, accounting for 18.83% (20 443/108 591). The most of the diagnosis was respiratory disease, accounting for 53.83% (66 522/123 576). A total of 1 057 critically ill children were received, accounting for 0.97% (1 057/108 591). A total of 911 accidental injuries were received, accounting for 0.84% (911/108 591). Acute upper respiratory tract infection was the most among all diagnoses, accounting for 34.47% (42 541/123 576).Conclusion:Children in the pediatric emergency department of Guangzhou Women and Children′s Medical Center are mainly under 5 years old, and the number of children is the most in July of the year.The main disease is respiratory diseases.Medical staff can be trained according to the actual situation, and the disease spectrum can be updated in time to provide convenience for emergency rescue and improve service level.

Objective? To?Study?the?changes?of?short-chain?acyl-CoA?dehydrogenase?(SCAD)?in?heart?failure?(HF)?after?myocardial?infarction?(MI),?and?the?effect?of?aerobic?exercise?on?SCAD.? Methods? Healthy?male?Sprague-Dawley?(SD)?rats?were?divided?into?sham?operation?group?(Sham?group),?sham?operation?swimming?group?(Sham+swim?group),?HF?model?group?(LAD?group)?and?HF?swimming?group?(LAD+swim?group)?by?random?number?table?method,?with?9?rats?in?each?group.?The?left?anterior?descending?branch?of?coronary?artery?(LAD)?was?ligated?to?establish?a?rat?model?of?HF?after?MI.?In?Sham?group,?only?one?loose?knot?was?threaded?under?the?left?coronary?artery,?and?the?rest?operations?were?the?same?as?those?in?LAD?group.?Rats?in?Sham+swim?group?and?LAD+swim?group?were?given?swimming?test?for?1?week?after?operation?(from?15?minutes?on?the?1st?day?to?60?minutes?on?the?5th?day).?Then?they?were?given?swimming?endurance?training?(from?the?2nd?week?onwards,?60?minutes?daily,?6?times?weekly,?10?weeks?in?a?row).?Tail?artery?systolic?pressure??(SBP)?was?measured?before?swimming?endurance?training?and?every?2?weeks?until?the?end?of?the?10th?week.?Ten?weeks?after?swimming?training,?echocardiography?was?performed?to?measure?cardiac?output?(CO),?stroke?volume?(SV),?left?ventricular?ejection?fraction?(LVEF),?shortening?fraction?(FS),?left?ventricular?end-systolic?diameter?(LVESD),?left?ventricular?end-diastolic?diameter?(LVEDD),?left?ventricular?end-systolic?volume?(LVESV),?and?left?ventricular?end-diastolic??volume?(LVEDV).?Morphological?changes?of?heart?were?observed?by?Masson?staining.?Apoptosis?of?myocardial?cells?was?detected?by?transferase-mediated?deoxyuridine?triphosphate-biotin?nick?end?labeling?stain?(TUNEL)?and?apoptosis?index?(AI)?was?calculated.?Reverse?transcription-polymerase?chain?reaction?(RT-PCR)?and?Western?Blot?were?used?to?detect?the?mRNA?and?protein?expression?of?myocardial?SCAD?respectively.?In?addition,?the?enzyme?activity?of?SCAD,?the?content?of?adenosine?triphosphate?(ATP)?and?free?fatty?acid?(FFA)?in?serum?and?myocardium?were?detected?according?to?the?kit?instruction?steps.? Results? Compared?with?Sham?group,?Sham+swim?group?showed?SBP?did?not?change?significantly,?with?obvious?eccentric?hypertrophy?and?increased?myocardial?contractility,?and?LAD?group?showed?persistent?hypotension,?obvious?MI,?thinning?of?left?ventricle,?and?decreased?myocardial?systolic/diastolic?function.?Compared?with?LAD?group,?SBP,?systolic/diastolic?function?and?MI?in?LAD+swim?group?were?significantly?improved?[SBP?(mmHg,?1?mmHg?=?0.133?kPa):?119.5±4.4?vs.?113.2±4.5?at?4?weeks,?120.3±4.0?vs.?106.5±3.7?at??6?weeks,?117.4±1.3?vs.?111.0±2.3?at?8?weeks,?126.1±1.6?vs.?119.4±1.9?at?10?weeks;?CO?(mL/min):?59.10±6.31?vs.?33.19±4.76,?SV?(μL):?139.42±17.32?vs.?84.02±14.26,?LVEF:?0.523±0.039?vs.?0.309±0.011,?FS:?(28.17±2.57)%?vs.?(15.93±3.64)%,?LVEDD?(mm):?8.80±0.19?vs.?9.35±0.30,?LVESD?(mm):?5.90±0.77?vs.?7.97±0.60,?LVEDV?(μL):?426.57±20.84?vs.?476.24±25.18,?LVESV?(μL):?209.50±25.18?vs.?318.60±16.10;?AI:?(20.4±1.4)%?vs.?(31.2±4.6)%;?all?P??0.05).? Conclusion? The?expression?of?SCAD?in?HF?was?significantly?down-regulated,?and?the?expression?was?significantly?up-regulated?after?aerobic?exercise?intervention,?indicating?that?swimming?may?improve?the?severity?of?HF?by?up-regulating?the?expression?of?SCAD.

Objective: To observe the vascular and bronchial abnormalities in subsolid nodules on high resolution CT (HRCT), and analyze its correlations with the classification and subtypes of lung adenocarcinoma. Methods: Pathological and radiographic data of 315 surgically resected subsolid nodules (226 were pure ground-glass opacities, and 89 were part solid nodules with tiny solid components ≤ 6 mm) were retrospectively reviewed. The morphologic changes of the blood vessels and bronchia/bronchioles in ground-glass opacity on HRCT were evaluated, and their correlations with histopathology classification were analyzed. Chi-square test was performed for analysis of correlations with categorical variables, whereas the one-way ANOVA analysis was performed for analysis of correlations with continuous variables (e.g., lesion dimension). Results: Forty-eight pre-invasive lesions (PILs), 29 minimally invasive adenocarcinomas (MIAs), and 238 invasive adenocarcinomas (IACs) were analyzed. IACs were divided into 2 groups according to the percentage of lepidic pattern: lepidic predominant (lepidic pattern ≥ 50%, n=145), and non-lepidic predominant (lepidic patten<50%, n=93). The prevalence of vascular and bronchial abnormalities was higher in IACs (59.24% & 18.49% in IACs, 13.79% & 3.45% in MIAs, and 0% & 0% in PILs). The abnormalities of vessels and bronchi in nodules on HRCT were correlated with the PIL/MIA/IAC classifications (χ²=69.797, P<0.001, χ²=14.213, respectively). Moreover the prevalence of valcular and bronchial abnormalities significantly increased from non-lepidic predominant IACs (78.49%, 26.88%) compared to lepidic predominant IACs (46.90%, 13.10%), these morphologic abnormalities correlated with a higher percentage of non-lepidic pattern, which were considered with higher invasiveness, in IACs (P<0.001, χ²=22.139, P=0.012, χ²=6.253, respectively). Conclusion The morphologic changes of blood vessels and bronchia/bronchioles within the subsolid nodules on HRCT help to differentiate IAC from PIL and MIA, also correlate with the proportion of non-lepidic pattern in IACs, even when the solid component undeveloped or very tiny.

Objective: To evaluate the efficacy and prognostic factors of comprehensive treatment of undifferentiated high grade pleomorphic sarcoma (UHGPS) in extremities and trunk, including surgery, radiotherapy and chemotherapy. Methods: A retrospective analysis and follow-up of 131 UHGPS cases with clinical stage Ⅱ or Ⅲ in extremities and trunk soft tissue was performed to analyze the prognostic factors. Survival data were collected through follow-up. The survival rate was calculated with life table method and Kaplan-Meier survival curves were drawn. Survival rate between the two groups was compared using Log rank test. The multivariate analysis was performed using Cox regression model. Results: The median survival time of 131 patients was 41.6 months. The 1-year, 3-year and 5-year survival rates were 95.0%, 82.0%, and 77.0%, respectively. The 5-year recurrence-free survival rate was 81.0%, and the 5-year metastasis-free survival rate was 72.0%. Univariate analysis showed that the tumor size, initial or recurrence, surgical margin, AJCC stage, and with/without standard treatment were associated with overall survival (all P<0.05). Stratification analysis according to the American Joint Committee of Cancer (AJCC) stage showed that 5-year survival rate of stage Ⅱ patients with radiotherapy was 100.0%, which was higher than that of patients without radiotherapy (79.6%) and the difference was statistically significant (P=0.010); but no statistical significance of radiotherapy for stage Ⅲ and chemotherapy for stage Ⅱ or Ⅲ patients (all P>0.05). The multivariate analysis showed surgical margin (HR=4.220, P=0.002), with/without standard treatment (HR=4.040, P=0.030) were independent risk factors associated with prognosis of UHGPS patients. Conclusions For UHGPS with stage Ⅱ or stage Ⅲ in extremities and trunk soft tissue, patients with complete resection and standard treatment have improved prognosis. Therefore, standard treatment, including extensive resection for the first surgery, should be performed according to expert consensus in order to increase the long-term survival rate. Adjuvant radiotherapy should be performed for stage Ⅱ patients.

Objective: To evaluate the clinical value of preoperative ¹⁸F-Fludeoxyglucose (¹⁸F-FDG PET-CT) in lymphatic metastasis diagnosis of cutaneous melanoma on extremities and trunk. Methods: 112 patients with cutaneous melanoma pathologically of extremities and trunk from January 2006 to December 2016, who received ¹⁸F-FDG PET-CT examination preoperatively, were retrospectively reviewed. The correlations between the maximal diameters of lymph nodes, the maximal standard uptake value (SUV) and the diagnostic impression grades of PET-CT examination, and the final pathological diagnosis were analyzed. The correlations between Breslow thickness of primary lesions and the diagnostic impression of PET-CT examination were also analyzed. All the above were analyzed with Receiver Operating Characteristic (ROC) curve to get the cut-off value. Based on the final results of pathological diagnosis of lymph nodes as the golden standard, the statistically significant indicators of ROC curve analysis were used to evaluate the diagnostic effect, as well as to calculate the sensitivity, specificity and accuracy. With gender, age, maximal diameter of lymph nodes, maximal SUV, diagnosis impressions, and Breslow thickness as the independent variables and pathological diagnosis results of lymph nodes as the dependent variable, two-class stepwise Logistic regression analysis was used to determine the independence of diagnostic indicators. ROC curve analysis and log rank test were used to analyze the relationship between Breslow thickness and patient survival. Results: To evaluate melanoma patients′ lymph node status, the results of ROC curve analysis showed that the area under the curve of lymph node maximal diameter, maximal SUV, diagnosis impression of PET-CT examinations were 0.789, 0.786 and 0.816, respectively (all P<0.05). The cut-off values were 0.85 cm, 1.45 and 2.5, respectively. The sensitivity of the cut-off values to determine the status of lymph nodes in melanoma patients were 71.4%, 64.9% and 72.1% respectively, and the specificities were 85.2%, 88.7% and 87.0% respectively. Multivariate Logistic regression analysis showed that PET-CT diagnosis impressions had independent diagnostic significance for the lymph node status of melanoma patients (OR=11.296, 95%CI: 2.550~50.033). The area under the curve of Breslow thickness evaluating PET-CT diagnostic impression is 0.664 (P=0.042) and the cut-off value was 4.25 mm. The survival rate of the patients with Breslow thickness ≥ 4.25 mm was lower than that in the group <4.25 mm (P=0.006). Conclusions ¹⁸F-FDG PET-CT can help to evaluate metastases and make treatment decisions for cutaneous melanoma of extremities and trunk, especially for patients whose primary lesion′s Breslow thickness has reached more than 4.25 mm. For the patients whose maximal SUV of regional lymph node is higher than 1.45 and short diameter of the largest lymph node is larger than 0.85cm, the possibility of metastases should be considered.