Objective To investigate clinicopathologic characteristics of malignant tumors initiated with cervical lymph nodes enlargement.Methods Clinical and pathological data of 887 cases with cervical malignant tumors kept in the college during January 1998 to December 2003 were analyzed for their histological patterns and primary site of metastatic carcinoma.Results Cervical cancer with lympb nodes metastasis was mostly seen at age of 51~60 years (182/837,21.74%), and much more common in men than in women. Major metastatic carcinomas in cervical lymph nodes originated from the nasopharynex, lung, thyroid, stomach and esophagus (591/671,88.08%), with 60.66%(407/671)of squamous cell carcinoma mostly from the nasopharynex, lung, or esophagus (380/407,93.37%). There was significant difference in the site, size, number, quality, appearance of lymph nodes, course of disease, and clinical manifestations between lymphoma and metastatic cancer.Conclusions Cervical metastatic carcinomas in Guangdong mainly originated from the nasopharynx. Some specific immunohistochemical markers, CT, MRI and ultrasonic technology played a very important role in diagnosis for lymphoma and determination of primary site of metastatic cancer.

Objective To explore the relationship between expressions of VEGF-C, VEGF-D and metastasis in papillary carcinoma of the thyroid. Methods Immunohistochemical method was used to detect the microvessel density(MVD) and expressions of VEGF-C and VEGF-D protein in 20 samples of nodular goiter and 115 samples with papillary carcinoma of the thyroid. Results The positive rates of VEGF-C and VEGF-D protein in nodular goiter were 15.0% and 20.0% respectively, and those in papillary carcinoma of the thyroid were 87.0% and 72.2%, respectively. The intratumour MVD in nodular goiter and papillary carcinoma of the thyroid was 15.2?6.7 and 21.5?8.5 respectively. The expressions of VEGF-C, VEGF-D protein and MVD in papillary carcinomas of the thyroid were significantly higher than those of nodular goiter. The expressions of VEGF-C and VEGF-D protein were closely related to lymph node metastasis of papillary carcinoma of the thyroid(P

Objective To evaluate the significance of p53,Cdk_4 and Survivin in gastric epithelial dysplasia with colonic and small intestinal metaplasia.Methods Immunohistochemical SP method was used to detect p53,Cdk_4,and Survivin in 44 cases of colonic intestinal metaplasia(27 low grade epithelial dysplasia,17 high grade epithelial dysplasia) and 51 cases of small intestinal metaplasia(42 low grade epithelial dysplasia,9 high grade epithelial dysplasia) by endoscope.Results The positive expression rates of p53 and Survivin had significant difference in two types of intestinal metaplasia and the difference was significant between low-grade and high-grade epithelial dysplasia.The expression of CDK_4 had significant difference in two types of intestinal metaplasia and had not difference between low-grade and high-grade epithelial dysplasia.Conclusion The expressions of p53,CdK_4 and Survivin are closely associated not only with the types of intestinal metaplasia but also with the different grades of epithelial dysplasia.The expression of p53,Cdk_4,and Survivin may be valuable markers in assessing the biological behavior of gastric epithelial dysplasia with intestinal metaplasia.

[Objective]To study NGF,BDNF gene modified bone marrowe stem cells transplantation with vein on spinal cord injury.[Method]Spinal cord injured rats were divided in to 3 groups.Group C consisted of the rats treated with the transplantation of modified NGF,BDNF genes BMSCs;group B of the rats with transplantation of BMSCs without genetic modification;group A of the rats without treatment and group D was the normal contral.At 2,6,10 weeks the rats were examined with GBS score and neurological function were tested.[Result]The vein with tintracord transplantation of modified BMSCs group was improved by the GBS score and neurological outcome of injured spinal cord was achieved well.[Conclusion]The vein with transplantation of modified NGF,BDNF genes BMSCs can recover of spinal cord injury.

Objective To investigate the value of pathological examination in the diag-nosis of lethal cases due to acute poisoning.Methods The macroscopic and microscopic find-ings in 28 autopsy cases (10 cases of toxic gas,7 cases of pesticide,6 cases of drug,3 cases of alcohol and 2 cases of chinese herbal medicine) died of acute poisoning during the period from October,2001 to June,2012 were retrospectively reviewed.Results Gross Changes were found on gross examination in 22 of the 28 cases studied.Of them,7 cases died of acute carbon mono-xide poisoning had showed cherry red of Shiban,muscle,visceral organs and blood.In addition,11 and 8 cases had been found gastric mucosa hemorrhage and epicardium petechial hemorrhage respectively.Histologically,myocardial interstitial hemorrhage was observed in 9 cases,pulmonary hemorrhage in 18 cases,bronchospasm in 12 cases,cerebral hemorrhage in 4 cases,hepato-cyte necrosis in 11 cases,renal tubular necrosis in 7 cases and gastric mucosa hemorrhage in 11 cases.In 6 cases of oral pesticides poisoning,besides they had all gastric mucosa hemorrhage,the change of character of gastric contents was found in 3 cases and pesticide odor from stomach in 3 cases.In addition,acute inflammatory and necrosis of gastric wall in 6 cases of oral pesticides poisoning were observed under the light microscope.Drug addicts often suffered from chronic lesions in multiple organs,such as chronic liver disease,fatty infiltration of the myocardium with myocardial atrophy,interstitial lung disease and pulmonary foreign body granuloma.Conclusions Pathology examination is helpful in the diagnosis of some lethal cases due to acute ooisoning,and it can provide pathological basis to study on treatment of acute poisoning.

Objective To study the application and significance of constructivism theory in pathological experiment teaching.Methods Six classes in total of 198 students majoring in clinical medicine were selected from grade 2009 of Guangdong medical college for research and were divided into experimental group (n=99) and control group (n=99) using random number table.Various teaching methods based on constructivism theory were used in experimental group while conventional teaching methods were applied in control group.The observing ability for specimen and slices,theoretical level and learning behavior of students were assessed with the same standard and anonymous homemade questionnaire survey was executed for students.SPSS 13.0 statistical software was used to analyze the results.The examination results of the two groups were compared using independent samples t-test.The questionnaire survey results of the two groups were compared using Wilcoxon rank-sum test.P＜0.05 represented the difference having statistical significance.Results The observing capability for specimen and slices,theoretical level and learning behavior of students in experimental group were significantly improved (P＜0.01)and the questionnaire survey results demonstrated that there were statistical difference in feedbacks between the two groups and the satisfaction rate was significantly improved in experiment group (P＜0.01).Conclusions Applying comprehensive teaching methods based on constructivism theory can stimulate students' interest and initiative in learning,improve students' learning behavior and learning strategies,and significantly improve the teaching quality.

Objective To study the expression and clinical significance of phosphorylated AKT (pAKT) and phosphatase and tensin homolog (PTEN) in colorectal carcinoma tissues.Methods The expression of pAKT and PTEN were detected by immunohistochemical SP method in 112 case of colorectal carcinomas tissue.Results The positive rates of pAKT and PTEN expression were 79.5 ％ (89/112) and 47.3 ％ (53/112) in colorectal cancerous tissues,respectively,which showed a statistically significance when compared with those in adjacent normal and adenoma tissues.The positive rate of pAKT expression was closely related with the invasive depth,clinical staging and lymph node metastasis of colorectal carcinomas.The positive expression of PTEN was also closely related with the invasive depth,degree of differentiation,clinical staging and lymph node metastasis of colorectal carcinomas.The expressions of pAKT and PTEN were negative correlaed.Conclusion The results showed that the expression of pAKT and PTEN were closely related with progression and metastasis of colorectal carcinomas,which may provide a new therapeutic target for colorectal carcinomas by blocking PTEN/PI3K/AKT signaling pathway.

Objective To investigate the role of Th22 cells and interlukin 22(IL-22) secreted by Th22 cells in the development of breast cancer. Methods The breast cancer model was established by in situ inoculation of 4T1 breast cancer cells in mice. The experimental group (20 cases) was injected with phosphoric acid buffer (PBS) 0.1 ml containing 4105 4T1 cells into the breast fat pad of mice, while the control group (20 cases) was injected with PBS 0.1 ml into the breast fat pad of mice without cells. Flow cytometry was used to detect Th22 cells in peripheral blood and enzyme linked immunosorbent assay (ELISA) was used to detect the level of IL-22 in serum. The difference of IL-22 levels between Th22 cells and serum was compared between the two groups, and the correlation between Th22 cells and IL-22 was analyzed. Real-time fluorescence quantitative PCR was used to detect the expression of IL-22. The phosphorylation of STAT3 in 4T1 cells treated with IL-22 was detected by Western blot. Results Tumors grew one week after in situ inoculation, and the expression of Th22 cells and IL-22 in serum was significantly increased and positively correlated with that in control group (r＝0.569, P＜0.01 or ＜0.05). The level of IL-22 mRNA in tumor group was significantly increased compared with that in normal group:(22.28 ± 2.52) ng/L vs. (18.92 ± 1.80) ng/L (P＜0.01), and STAT3 was phosphorylated by 4T1 cells after IL-22 treatment. Conclusions Th22 cells and cytokines IL-22 secreted by them can promote the occurrence and development of breast cancer by affecting STAT3 phosphorylation.

OBJECTIVETo compare clinicopathological characteristics of coronary artery disease (CAD) patients with or without sudden coronary death (SCD) .

METHODSA total of 145 autopsy cases with CAD were divided into SCD group (38 cases) and non-SCD group (107 cases). The difference on age, number of diseased coronary vessel, coronary atherosclerotic stage (fatty streak stage, fibrous plaque stage and atheromatous plaque stage), composite lesions of coronary artery, grade of stenosis severity, acute myocardial infarction, old myocardial infarction, hypertensive cardiomyopathy, myocardial fatty infiltration and arteriosclerosis of the arteries on the base of the brain were compared between SCD group and non-SCD group.

RESULTS(1) Patients were older in SCD group than in non-SCD group [ (55.3 ± 14.5) years vs. (48.5 ± 13.3) years, P < 0.01]. (2) There was a significant positive correlation between coronary atherosclerotic stage and grade of coronary stenosis severity (rs = 0.79, P < 0.01) . (3) The rate of multiple vessel disease, coronary atherosclerotic stage, composite lesions of coronary artery, grade III-IV coronary artery stenosis, old myocardial infarction and arteriosclerosis of the arteries on the base of the brain were 60.5% (23/38) , 84.2% (32/38), 63.2% (24/38), 86.8% (33/38), 36.8% (14/38) and 34.2% (13/38), respectively in SCD group, which were significantly higher than those in non-SCD group [25.2% (27/107), 29.0% (31/107) , 18.7% (20/107), 19.6% (21/107), 3.7% (4/107) and 6.5% (7/107), respectively, all P < 0.01].

CONCLUSIONCoronary artery atherosclerotic lesion is severer and patients are older in SCD patients than in non-SCD patients in this coronary artery disease patient cohort.

Adult ; Aged ; Aged, 80 and over ; Autopsy ; Coronary Artery Disease ; pathology ; Death, Sudden, Cardiac ; pathology ; Female ; Humans ; Male ; Middle Aged ; Young Adult

The dental operative microscope has been widely employed in the field of dentistry, particularly in endodontics and operative dentistry, resulting in significant advancements in the effectiveness of root canal therapy, endodontic surgery, and dental restoration. However, the improper use of this microscope continues to be common in clinical settings, primarily due to operators' insufficient understanding and proficiency in both the features and established operating procedures of this equipment. In October 2019, Professor Jingping Liang, Vice Chairman of the Society of Cariology and Endodontology, Chinese Stomatological Association, organized a consensus meeting with Chinese experts in endodontics and operative dentistry. The objective of this meeting was to establish a standard operation procedure for the dental operative microscope. Subsequently, a consensus was reached and officially issued. Over the span of about four years, the content of this consensus has been further developed and improved through practical experience.
Humans ; Dentistry, Operative ; Consensus ; Endodontics ; Root Canal Therapy ; Dental Care