【Objective】 To evaluate the HBsAg detection results of HBsAg+ samples after 8 years refrigeration by ELISA and evaluate the effectiveness of the current storage policy of retained samples. 【Methods】 A total of 100 HBsAg+ plasma samples by ELISA from May 2014 to March 2015 and refrigerated at -20℃ were collected and retested for HBsAg using the same method after thawing in 2023. 【Results】 The HBsAg retest results of 100 plasma samples were all positive, with the concordance rate of 100%, though there was a significant decrease in the S/CO value after refrigeration(27.52 vs 19.03, P<0.05). 【Conclusion】 Long-term refrigeration can lead to a decrease in the S/CO value of HBsAg ELISA detection,but it does not affect the positive results.

Objective:To explore the value of diffusion tensor imaging (DTI) in evaluating the effects of hyperbaric oxygen therapy (HOT) in treating spinal cord injury.Methods:The modified Allen′s method was used to induce a traumatic spinal cord injury in 30 rats who were then divided randomly into an injured group and a treatment group, each of 15. The treatment group was given HOT twice a day for 3 days, then once a day for a total of 4 weeks. The injured group did not receive HOT. DTI was performed (along with Basso-Beattie-Bresnahan (BBB) evaluation) at 0h, 6h, 24h, as well as 3, 7, 14, 21 and 28 days after the operation. Two-factor repeated measures ANOVA was conducted to analyze any differences in the DTI results: the fractional anisotropy, mean apparent diffusivity, radial diffusivity and axial diffusivity, as well as the BBB scores. LSD t-tests were performed to analyze the significance of the differences at different time points.Results:At each time point after 24h the average FA value of the treatment group was significantly higher than the injured group′s average, while its average MD and RD values were significantly lower. Beyond 14 days the average AD value of the treatment group was significantly higher than that of the injured group. The treatment group′s average BBB score was also significantly higher at all the time points beyond 3 days.Conclusions:DTI results can evaluate spinal cord function and provide valuable information for the dynamic assessment of hyperbaric oxygen therapy after a traumatic spinal cord injury, and the therapy promotes the recovery of motor function, at least in rats.

Objective:To analyze the expression of endoplasmic reticulum lipid raft-associated protein 2 (ERLIN2) in glioblastoma tissues, and to analyze its correlation with the clinicopathological features and prognosis of patients with glioblastoma.Methods:The TCGA database was used to analyze the expression level of ERLIN2 mRNA in glioblastoma. KM-plotter was used to analyze the correlation between ERLIN2 expression and prognosis in patients with glioblastoma. The expression level of ERLIN2 protein in 78 cases of glioblastoma tissue was determined by immunohistochemical staining, and then the tissue samples were divided into high expression and low expression groups according to the ERLIN2 expression level. The clinical and pathological data of patients were collected, including age, gender, tumor laterality, recurrence, isocitrate dehydrogenase(IDH) mutation, and the correlation between ERLIN2 protein and clinicopathological characteristics was further analyzed.Results:The mRNA of ERLIN2 was significantly overexpressed in glioblastoma, and the overall survival rate of patients with high ERLIN2 expression was low, suggesting a poor prognosis. The results of immunohistochemistry and clinicopathological analysis showed that ERLIN2 protein was significantly overexpressed in glioblastoma, and its expression level was significantly related to tumor recurrence.Conclusions:ERLIN2 protein is significantly overexpressed in glioblastoma tissues, and its expression level is related to the clinicopathological characteristics and poor prognosis, suggesting that ERLIN2 can be used as a potential prognostic factor for glioblastoma.

Objective:To study the clinicopathological characteristics and pathologic diagnosis of autoimmune gastritis.Methods:Fourteen biopsies of autoimmune gastritis were collected from January 2018 to March 2019 at Guangdong Provincial People′s Hospital. Their clinical data, histological features and immunohistochemical (IHC) results were analyzed, with review of relevant literature.Results:All 14 patients′ ages ranged from 41 to 79 years (mean 55 years). There were 12 females and 2 males. All patients had non-specific symptoms, but they all had positive serum anti-parietal cell antibody and/or anti-intrinsic factor antibody. Seven patients had variable degree of anemia. Two patients had concomitant H. pylori infection. Two patients presented with multiple protruding polyps in corpus/fundus, 0.2 to 0.9 cm in diameter, or multiple large lobulated and broad based polyps (0.8 to 3.5 cm in diameters). The former cases were diagnosed as type 1 neuroendocrine tumors, the latter were multiple hyperplastic polyps. Microscopically, autoimmune gastritis showed typical morphology, characterized by diffuse corpus-restricted atrophic gastritis with variable proportions of intestinal metaplasia, or pseudopyloric metaplasia, pancreatic, acinar metaplasia, foveolar hyperplasia and hyperplasia of the endocrine-like cells (ECL cells). Hyperplasia of ECL cells often needed IHC staining to confirm. CgA/Syn IHC stain highlighted linear and micronodular ECL cell hyperplasia. In the absence of concurrent or past H. pylori infection, the antrum was usually normal. Gastrin IHC stain showed hyperplasia of gastrin-producing cells (G cells) in the antrum. Two cases were in the early phase, six were in florid phase, and six were end phase.Conclusions:Most patients of autoimmune gastritis have non-specific symptoms or are asymptomatic and show various endoscopic findings. There are three histologic phases of autoimmune gastritis. Recognition of this entity would be beneficial for pathologists to avoid misdiagnosis. Pathologists can make preferred diagnosis of autoimmune gastritis depending on the histologic clues and prompt appropriate and timely management for the patients.

Objective: To study the clinicopathological characteristics, immunophenotype, pathologic diagnosis and differential diagnosis of diffuse pulmonary meningotheliomatosis (DPM). Methods: The clinical data, histological features and immunohistochemical results of three cases of DPM collected from January 2016 to May 2018 at Guangdong Provincial People′s Hospital were analyzed, and the relevant literature reviewed. Results: The three DPM patients age was 53, 69 and 74 years. The lesions consisted of multiple minute pulmonary meningothelial-like nodules profusely involving the lungs. Microscopically, they showed typical morphology, characterized by medium-sized elongated tumor cells resembling meningothelial cells with whorled/nested clusters. The cells were uniform and had abundant eosinophilic cytoplasm with oval nuclei with delicate chromatin. Immunohistochemical staining showed tumor cells were diffusely and strongly positive for EMA, vimentin and PR, but were negative for CAM5.2, CgA, Syn, CK7 and TTF1. Conclusions DPM is extremely rare, and may be confused with primary interstitial pulmonary processes and metastatic malignant tumors of lung. Recognition of this entity is essential for pathologists to avoid misdiagnosis and unnecessary treatment.

Objective: To study the clinicopathological characteristics of cardiac neoplasms. Methods: A total of 689 cases of cardiac neoplasms from January 1st 1992 to December 31th 2017 at Guangdong Provincial People′s Hospital were collected. The clinical data and histologic features were analyzed along with a review of literature. The pathological diagnosis and classification were based on the criteria of WHO 4th edition(2015). Results: Among 689 cases of cardiac neoplasms, 259 were male and 430 were female patients, with age from 0 to 84 years (mean of 48 years). The peak incidence was between the fourth and sixth decade. Among patients younger than 20 years, there were 24 males and 12 females. 674 cases(674/689,97.8%)were primary cardiac tumors and 15 cases were secondary tumors (15/689,2.2%). Amongst the primary cardiac neoplasms, 625 cases were benign(625/674,92.7%), 7 cases were borderline (7/674, 1.0%), and 42 cases were malignant (42/674, 6.2%). The incidences of benign, borderline and malignancy heart tumors among patients below 20 years old were lower than those of patients over 20 years of age (4.8% vs. 95.2%; 3/9 vs. 6/9; 5.5% vs. 94.5%, respectively). Of the benign tumors, 406 cases were female and 219 cases were male. More male than female patients were seen in borderline and malignancy cardiac tumor categories (6∶3; 34∶21). Of 625 benign tumors, 577 cases were myxoma(85.6%), which mainly occurred in patients over 20 years of age(85.9% vs. 14.1%) with a female predominance. Non-myxomas mainly occurred in children and adolescent patients compared to adult (55.6% vs. 44.4%, P<0.01) with a male predominance. Overall, 524 tumors originated from the left atrium, 84 cases from the right atrium, 26 cases from the pericardium, 23 cases from the right ventricular, and 11 cases from the left ventricle. However, 21 cases were multicentric or involving cardiac valves. Benign tumors mainly involved left heart(76.3%) vs. right heart(81/625, 12.6%). The mostly common location of borderline tumors was right heart(5/9). Malignant tumors tended to involve the right heart(22/55,40.0%) and pericardium(18/55, 32.7%). Conclusions Although the incidence of cardiac neoplasms is low,various tumor types can occur, most of which are myxoma with a female predominance. Non-myxomas mainly occur in children and adolescents with a male predominance.

Objective To study the clinicopathological characteristics of cardiac neoplasms. Methods A total of 689 cases of cardiac neoplasms from January 1st 1992 to December 31th 2017 at Guangdong Provincial People′s Hospital were collected. The clinical data and histologic features were analyzed along with a review of literature. The pathological diagnosis and classification were based on the criteria of WHO 4th edition(2015). Results Among 689 cases of cardiac neoplasms, 259 were male and 430 were female patients, with age from 0 to 84 years (mean of 48 years). The peak incidence was between the fourth and sixth decade. Among patients younger than 20 years, there were 24 males and 12 females. 674 cases(674/689,97.8%)were primary cardiac tumors and 15 cases were secondary tumors (15/689,2.2%). Amongst the primary cardiac neoplasms, 625 cases were benign(625/674,92.7%), 7 cases were borderline (7/674, 1.0%), and 42 cases were malignant (42/674, 6.2%). The incidences of benign, borderline and malignancy heart tumors among patients below 20 years old were lower than those of patients over 20 years of age (4.8% vs. 95.2%; 3/9 vs. 6/9; 5.5% vs. 94.5%, respectively). Of the benign tumors, 406 cases were female and 219 cases were male. More male than female patients were seen in borderline and malignancy cardiac tumor categories (6∶3; 34∶21). Of 625 benign tumors, 577 cases were myxoma(85.6%), which mainly occurred in patients over 20 years of age(85.9% vs. 14.1%) with a female predominance. Non?myxomas mainly occurred in children and adolescent patients compared to adult (55.6% vs. 44.4%, P<0.01) with a male predominance. Overall, 524 tumors originated from the left atrium, 84 cases from the right atrium, 26 cases from the pericardium, 23 cases from the right ventricular, and 11 cases from the left ventricle. However, 21 cases were multicentric or involving cardiac valves. Benign tumors mainly involved left heart(76.3%) vs. right heart(81/625, 12.6%). The mostly common location of borderline tumors was right heart(5/9). Malignant tumors tended to involve the right heart(22/55,40.0%) and pericardium(18/55, 32.7%). Conclusions Although the incidence of cardiac neoplasms is low,various tumor types can occur, most of which are myxoma with a female predominance. Non?myxomas mainly occur in children and adolescents with a male predominance.

Objective To study the clinicopathological characteristics, immunophenotype, pathologic diagnosis and differential diagnosis of diffuse pulmonary meningotheliomatosis (DPM). Methods The clinical data, histological features and immunohistochemical results of three cases of DPM collected from January 2016 to May 2018 at Guangdong Provincial People′s Hospital were analyzed, and the relevant literature reviewed. Results The three DPM patients age was 53, 69 and 74 years. The lesions consisted of multiple minute pulmonary meningothelial?like nodules profusely involving the lungs. Microscopically, they showed typical morphology, characterized by medium?sized elongated tumor cells resembling meningothelial cells with whorled/nested clusters. The cells were uniform and had abundant eosinophilic cytoplasm with oval nuclei with delicate chromatin. Immunohistochemical staining showed tumor cells were diffusely and strongly positive for EMA, vimentin and PR, but were negative for CAM5.2, CgA, Syn, CK7 and TTF1. Conclusions DPM is extremely rare, and may be confused with primary interstitial pulmonary processes and metastatic malignant tumors of lung. Recognition of this entity is essential for pathologists to avoid misdiagnosis and unnecessary treatment.

Objective To explore the value of DTI quantitative parameters in evaluating neurological function changes of acute traumatic spinal cord injury (TSCI)in rat models.Methods The modified Allen's dropping weight technique was used to establish TSCI rat models.Then the rats were divided into mild injury group,moderate injury group and severe injury group (each n=10).DTI examination and Basso-Beattie-Bresnahan (BBB) score were performed pre-TSCI and 0 h,6 h,24 h,3 day,7 day and 14 day post-TSCI,respectively.The BBB scores and DTI parameters,including FA,mean apparent diffusivity (MD),radial diffusivity (RD) and axial diffusivity (AD) were measured and compared among groups.The correlation between BBB scores and the parameters was evaluated.Results The differences of FA,MD and RD value were statistically significant among varying injury degree groups and different time points after TSCI (all P＜0.05).AD value had statistical difference among different time points (F=12.720,P＜0.001),whereas no difference was found among varying injury degree groups (F=0.469,P=0.630).FA and MD values decreased while RD increased 0 h post-TSCI.Then RD and MD increased continuously,whereas FA decreased continuously until 24 h post TSCI (all P＜0.05),and the parameters kept stable after 24 h post-TSCI (all P＞ 0.05).The BBB scores were lowest on 0 h post-TSCI,then maintained increasing (all P＜0.05).In addition,the BBB scores and MD values had good correlation (r=0.958,P＜ 0.01).Conclusion DTI can quantitatively evaluate function changes of TSCI in rat models.Moreover,treatment within 24 h post-TSCI might be recommended for TSCI therapy.

Purpose To explore the value of 320 row dynamic volume CT angiography in the preoperative assessment of juvenile nasopharyngeal angiofibroma (JNA) and in determining feeding arteries.Materials and Methods The imaging data of 18 cases with JNA proved by surgery and pathology and examined by 320 row dynamic volume CT were analyzed retrospectively.The imaging staging and feeding artery of tumors were determined.Results Most tumors (17/18) showed heterogeneous enhancement in the early stage of enhancement.With the extension of time,the enhancement scope of lesions expended.The time-density curve (TDC) of 11 cases demonstrated rapid ascending and rapid descending after injecting contrast,while 7 cases showed continuous increasing.The blood supply of all tumors included the external carotid artery system of the affected side and showed a close relationship with tumor staging.With the increase of tumor stage,the number of feeding arteries increased (r=0.858,P＜0.05).The feeding arteries of stage Ⅱc and stage Ⅲ tumors included ipsilateral maxillary artery and ascending pharyngeal artery.Besides,the effective radiation dose of 320 row CT angiography for searching arteries [(3.30±0.08) mSv]was less than that of DSA [(7.62±2.39) mSv] (t=-7.98,P＜0.05).Conclusion The 320 row dynamic volume CT imaging of JNA has certain characteristics,which can display the blood supply artery and accurate staging of tumors,thus it has important value in preoperative evaluation of JNA.