A retrospective analysis was conducted on data of 13 patients with rectal or anal canal lesions involving the dentate line who underwent endoscopic submucosal dissection (ESD) at the Digestive Endoscopy Center of Jiangsu Province Hospital of Chinese Medicine from January 2022 to July 2023. The efficacy and safety of ESD were evaluated. ESD was performed on 14 lesions in 13 patients. The lesions had a length of 1.4 to 12.5 cm and 5.4 cm in average, which were removed entirely in a single session, with an R0 resection rate of 92.31% (12/13). The ESD procedure duration ranged from 35 to 225 minutes, with an average of 88.3 minutes. Anal canal stenosis occurred in 1 case after ESD, which was improved after treatment with anal dilatation. No delayed bleeding, perforation, or other complications occurred. Pathological examination after ESD revealed 6 tubulovillous adenoma, 2 tubular adenoma, 3 tubular adenocarcinoma, and 2 squamous epithelial intraepithelial neoplasia (both 2 lesions were combined with human papillomavirus infection). In one case of tubular adenocarcinoma, the local resection margin showed focal tubulovillous adenoma, while the other cases were negative on lateral margins around and basal margins. The median follow-up period was 7.0 months (range 2 to 13 months), with no local residue, recurrence or metastasis observed. ESD is safe and effective for early rectal or anal canal lesions involving the dentate line, and is worthy of clinical promotion and application.

Objective: To investigate the factors affecting macular degeneration (MD) in middle-aged and elderly populations, so as to provide the reference for prevention and treatment of MD. Methods: People at ages of 50 years and older who were admitted to ophthalmology department of Hangzhou First People's Hospital and received MD screening were selected as the study subjects. General information including age, gender, eye-using habits and family history of MD were collected by questionnaire surveys. MD was diagnosed by ophthalmological examination, and the prevalence of MD in middle-aged and elderly people was analyzed. A multivariable logistic regression model was used to identify the influencing factors of MD. Results: A total of 2 832 people were investigated, including 1 527 males (53.92%) and 1 305 females (46.08%), and 1 878 people (66.31%) aged 70 years and older. There were 498 people (17.58%) with good eye-using habits, 1 180 (41.67%) with general eye-using habits and 1 154 (40.75%) with poor eye-using habits. There were 1 817 people with family history of MD (64.16%). Multivariable logistic regression analysis showed that people at ages of 70 years and older (OR=2.815, 95%CI: 1.350-5.871), with poor eye-using habits (OR=2.354, 95%CI: 1.373-4.035), with family history of MD (OR=2.782, 95%CI: 1.138-6.799), with cataract (OR=2.593, 95%CI: 1.157-5.815) and with visual central defect (OR=2.601, 95%CI: 1.252-5.404) had a higher risk of MD. Conclusion Age, eye-using habits, family history of MD, cataract and visual central defect are influencing factors for MD in middle-aged and elderly populations.

Objectives:To investigate the clinical and genetic features of young Chinese patients with myeloproliferative neoplasms (MPN) .Methods:In this cross-sectional study, anonymous questionnaires were distributed to patients with MPN patients nationwide. The respondents were divided into 3 groups based on their age at diagnosis: young (≤40 years) , middle-aged (41-60 years) , and elderly (>60 years) . We compared the clinical and genetic characteristics of three groups of MPN patients.Results:1727 assessable questionnaires were collected. There were 453 (26.2%) young respondents with MPNs, including 274 with essential thrombocythemia (ET) , 80 with polycythemia vera (PV) , and 99 with myelofibrosis. Among the young group, 178 (39.3%) were male, and the median age was 31 (18-40) years. In comparison to middle-aged and elderly respondents, young respondents with MPN were more likely to present with a higher proportion of unmarried status (all P<0.001) , a higher education level (all P<0.001) , less comorbidity (ies) , fewer medications (all P<0.001) , and low-risk stratification (all P<0.001) . Younger respondents experienced headache (ET, P<0.001; PV, P=0.007; MF, P=0.001) at diagnosis, had splenomegaly at diagnosis (PV, P<0.001) , and survey (ET, P=0.052; PV, P=0.063) . Younger respondents had fewer thrombotic events at diagnosis (ET, P<0.001; PV, P=0.011) and during the survey (ET, P<0.001; PV, P=0.003) . JAK2 mutations were found in fewer young people (ET, P<0.001; PV, P<0.001; MF, P=0.013) ; however, CALR mutations were found in more young people (ET, P<0.001; MF, P=0.015) . Furthermore, mutations in non-driver genes (ET, P=0.042; PV, P=0.043; MF, P=0.004) and high-molecular risk mutations (ET, P=0.024; PV, P=0.023; MF, P=0.001) were found in fewer young respondents. Conclusion:Compared with middle-aged and elderly patients, young patients with MPN had unique clinical and genetic characteristics.

Objective:To explore the feasibility of smart phone real-time picture exchange-assisted telecytopathology for rapid on-site evaluation (tele-ROSE), and the role of tele-ROSE in improving the diagnostic efficiency of endoscopic physicians.Methods:Data of patients who underwent endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) from April 2020 to May 2021 in Qilu Hospital of Shandong University were retrospectively collected. Patients who didn't receive ROSE from April 2020 to October 2020 were enrolled in the non-ROSE group, and those who underwent ROSE from November 2020 to May 2021 were enrolled in the ROSE group, of which endosonographers used WeChat on the smartphone to send ROSE images to cytopathologists from November 2020 to March 2021 were the mobile phone group, and those whose ROSE results independently diagnosed by trained endosonographers from April 2021 to May 2021 were the self-ROSE group. Basic information, ROSE results, postoperative pathology and follow-up were compared, and the diagnostic effectiveness of tele-ROSE was analyzed.Results:A total of 188 cases were included, of which 179 cases (95.2%) were solid pancreatic lesions and 9 (4.8%) were enterocoelia lesions. There was no significant difference in the puncture time among the non-ROSE, mobile phone and self-ROSE groups [3 (3, 4) VS 3 (3, 4) VS 3 (2, 4), H=1.320, P=0.517]. With the final diagnosis as the golden standard, the sensitivity, the specificity, the accuracy, the positive predictive value, the negative predictive value and Kappa value of the non-ROSE group were 80.6% (58/72), 89.5% (17/19), 82.4% (75/91), 96.7% (58/60), 54.8% (17/31), and 0.6 respectively. The corresponding indices in the ROSE group were 97.4% (74/76), 100.0% (21/21), 97.9% (95/97), 100.0% (74/74), 91.3% (21/23), and 0.9 respectively, those of the mobile phone group were 95.2% (40/42), 100.0% (10/10), 96.2% (50/52), 100.0% (40/40), 83.3% (10/12), and 0.9 respcetively, and those of the self-ROSE group were 100.0% (34/34), 100.0% (11/11), 100.0% (45/45), 100.0% (34/34), 100.0% (11/11), and 1.0 respectively. The sensitivity ( P=0.002), the accuracy ( P=0.001) and the negative predictive value ( P=0.009) of the ROSE group were significantly higher than those of the non-ROSE group, and there was no significant difference in other diagnostic efficacy indices ( P>0.05). There was no significant difference between the mobile phone group and the self-ROSE group in diagnostic efficacy ( P>0.05). Conclusion:Instant smartphone-assisted tele-ROSE through WeChat can well meet the needs of pathologists and endoscopic physicians. After the application of tele-ROSE training, the diagnostic accuracy of endoscopic physicians is equivalent to that of cytopathologist, which helps to obtain more sufficient specimens under endoscopy and improve the diagnostic accuracy of EUS-FNA.

Objective To investigate the relationship between atrial fibrillation and left heart structure change in patients with hemodialysis combined with hemoperfusion.Methods A total of 60 patients with end-stage renal disease who underwent hemodialysis combined with hemoperfusion treatment in Ganzhou Hospital of Traditional Chinese Medicine from December 2020 to December 2021 were selected.Thirty patients with atrial fibrillation were included in observation group,and thirty patients without atrial fibrillation were included in control group.The left heart structure indexes of two groups were compared,and the relationship between atrial fibrillation and left heart structure change in patients with hemodialysis combined with hemoperfusion was analyzed.Results Left ventricular end diastolic diameter(LVEDD),left ventricular end systolic diameter(LVESD),left atrium diameter(LAD),interventricular septal thickness(IVST),and left ventricular posterior wall thickness(LVPWT)in observation group were higher than those in control group,and left ventricular ejection fraction(LVEF)was lower than that in control group(P<0.05).Logistic regression analysis showed that the decrease of LVEF and the increase of LVEDD,LVESD,LAD,IVST and LVPWT were associated with atrial fibrillation in patients with hemodialysis combined with hemoperfusion(P<0.05).The results of receiver operating characteristic curve showed that area under the curve of LVEDD,LVESD,LAD,LVEF,IVST and LVPWT in diagnosing atrial fibrillation in patients with hemodialysis combined with hemoperfusion were 0.724,0.708,0.760,0.761,0.762 and 0.758,respectively,which had certain diagnostic value.Conclusion Atrial fibrillation in patients with hemodialysis combined with hemoperfusion is related to the change of left heart structure,and the left heart structure indexes are helpful to assist the diagnosis of atrial fibrillation.

Objective:To explore the effect of three-dimensional(3D) design and printing in the reoperation of asymmetric deformity after orthognathic surgery.Methods:Patients of facial asymmetry after orthognathic surgery were included in the Department of Stomatology, Shenzhen University General Hospital and Department of Oral & Maxillofacial Surgery, Shenzhen Stomatology Hospital Affiliated to Shenzhen University from January 2016 to August 2020. Surgical plans and guide plates (positioning guide plate, bone cutting guide plate, reset guide plate) were made by 3D design and printing. During the operations, guide plates were used to guide osteotomy. The facial shape satisfaction of clinicians/patients/third-party were recorded and analyzed at preoperation and 6-12 months postoperation. These patients’ CT scan data was imported to the digital surgery software. Then the distance of chin-midpoint to mid-sagittal plane and the difference of bilateral protuberant point of mandible body to mid-sagittal plane were measured at preoperation and 6-12 months postoperation to determine whether the asymmetry were corrected and postoperative distance were the same as the preoperative design. Data analysis was conducted using SPSS 17.0 statistical software, and measurement data were expressed as Mean±SD. The preoperative and postoperative satisfaction of patients/clinicians/third-party, digital data of preoperation/postoperation and digital data of design-operations/postoperation were analyzed by paired t-test. Analysis of variance and dunnett- t test were used to compare the satisfaction of the surgeon, the third party and patients before and after operation. Results:There were 16 cases of facial asymmetry after orthognathic surgery, including 3 males and 13 females, aged from 18 to 35 years. In 9 cases, genioplasty were used to correct chin deviation. In the other 4 cases, unilateral buccal cortical bone resection were used to correct mandibular body deviation. In the last 3 cases, genioplasty and unilateral buccal cortical bone resection were both applied. All 16 patients successfully received the operation according to the preoperative digital designed plate. Postoperative follow-up ranged 6 months to 1 year. In the 12 cases of genioplasty, the distance of chin-midpoint to mid-sagittal plane reduced from(4.99±0.83) mm preoperatively to (1.63±0.80) mm postoperatively and the difference significant ( t=9.09, P<0.001). There was no significant difference between the distance of preoperative design [(1.50±0.43) mm] and the postoperative one ( t=-0.83, P=0.423). In the 7 cases of unilateral buccal cortical bone resection, the difference of bilateral protuberant point of mandible body to mid-sagitta plane reduced from (7.26±1.20) mm preoperatively to (2.44±0.56) mm postoperatively and the difference was statistically significant ( t=10.26, P<0.001). There was no significant difference was observed between the distance of preoperative design [(2.39±0.16) mm] and the postoperative one ( t=-0.29, P=0.779). The preoperative satisfaction of patients, clinicians and third-party were 65.94±8.21, 79.69±5.91, 79.38±7.50. The postoperative satisfaction of patients, clinicians and third-party were 90.00±5.48, 90.63±2.50, 90.00±4.08. The postoperative satisfaction of patients, chief surgeon and third party was higher than that preoperative satisfaction and the difference was statistically significant( t=-9.15, P<0.001; t=-7.50, P<0.001; t=-6.04, P<0.001). The difference of preoperation satisfaction was statistically significant( F=18.66, P<0.001). The difference of satisfaction of the clinicians and the patients was statistically significant ( P<0.001). The difference of satisfaction of the third-party and the patients was statistically significant ( P<0.001). The difference of postoperation satisfaction was not statistically significant( F=0.12, P=0.889). Conclusions:3D design and printing can 3D analyze comprehensively, simulate surgery accurately, visualize proposed result and guide 3D printing digital guiding plate to perform surgery accurately. In addition, it can improve postoperative satisfaction. So 3D design and printing had obvious advantages in the secondary surgery of asymmetric deformity correction after orthognathic surgery.

Objective:To describe the baseline characteristics of the subjects enrolled in the China Quantitative CT (QCT) big data program in 2018—2019.Methods:Based on baseline data from the Chinese health big data project from January 2018 to December 2019 from the eligible enrolled population, measurements of bone mineral density (BMD) and visceral adipose tissue (VAT) were performed using Mindways′ QCT Pro Model 4 system. The baseline data of age, gender, regional distribution, height, weight, abdominal circumference, blood pressure, blood routine and blood biochemical tests were analyzed. And the single factor analysis of variance (ANOVA) was used to check the age related trend of BMD and VAT in both genders.Results:After screening the inclusion exclusion criteria and outliers of the main indicators, 86 113 people were enrolled in the project. The enrollment rate was 92.47%, including 35 431 (41.1%) women and 50 682 (58.9%) men, and the ratio of men to women was 1.43. The mean age was (50.3±12.7) years in all the subjects, and it was (50.2±12.8) years and (50.4±12.5) years in men and women, respectively, and there was no statistical difference between the two genders ( P>0.05). Total of 43 833 people were enrolled in east China, it was the largest group by region (50.90%), it was followed by central China (16 434 people, 19.08%), and the number of people enrolled in Northeast China was the lowest (2 914 people, 3.38%). The rate of completing of health information indicators related to the main outcome of the study were all above 70%, and there were significant differences between men and women (all P<0.05). The mean BMD was (139.33±46.76) mg/cm 3 in women, (135.90±36.48) mg/cm 3 in men, which showed a decreasing trend with age in both gender (both P<0.001); the mean intra-abdominal fat area was (116.39±56.23) cm 2 in women, (191.67±77.07) cm 2 in men, and there was an increasing trend with age in both men and women (both P<0.001). Conclusions:There are gender differences in BMD and VAT measured by QCT with different age tendency, and there are gender differences in health information index. Regional factors should also be taken into account for regional differences in the inclusion of data.

Objective:To investigate the normal reference values of spinal bone mineral density measured by quantitative computed tomography (QCT) and the differences of bone mineral density (BMD) in different regions of in Chinese adult males.Methods:Men who underwent low-dose CT lung scan for cancer screening in regions of Northeast, North, East, South, Central and Southwest of China from January 2018 to December 2019 were selected. And the lumbar vertebrae BMD values in the male subjects were measured by the QCT system (Mindways Software, Inc.). The mean BMD values and their decline rates were calculated at an age interval of 10 years, and the prevalence of osteoporosis was calculated according to the American College of Radiology spine QCT osteoporosis diagnostic criteria.Results:A total of 50 682 males with a mean age of (50.22±12.79) years (ranged 20 to 98 years) were included in this study. The peak BMD of (173.11±28.56) mg/cm 3 in the healthy Chinese adult male population appeared in the age group of 20 to 29 years and then declined with age. Before the age of 70 years, the BMD was relatively higher in males in South China, and it was lower in Central China and Southwest China, and it was intermediate in Northeast, North and East of China, with statistically significant differences. There was no significant differences in BMD in the males in the two age groups of 70 to 79 years and 80 and older among the regions in China. The overall decline rate of spinal BMD in Chinese males under QCT was about 46.92% over the lifetime, and it declined obviouslyin the 40-49 age group. The overall prevalence of osteoporosis in Chinese male population aged 50 years and above was approximately 11.42%, with the highest prevalence in Southwest China and Central China (14.72% and 13.87%, respectively) and the lowest in North China and South China (8.53% and 7.71%, respectively). Conclusions:A reference of lumbar spine BMD values for healthy males in China based on QCT is established. BMD values were highest in South China and Lowest in Central China.

Objective:To establish the normal reference value of lumbar bone mineral density (BMD) under quantitative CT (QCT) in Chinese healthy adult females and to explore the regional differences.Methods:Total of 35 431 healthy women who met the inclusion criteria of Chinese health quantitative CT big data program were selected in this study. The BMD of the central plane of L 1 and L 2 vertebrae was measured by Mindways′s QCT system, and the mean value was taken. One-way analysis of variance was used to compare the BMD differences of lumbar vertebrae in women of different ages and regions. The subjects were grouped by an age interval of 10 years, and the level of BMD in different regions of the same age group were compaired. Results:The peak BMD of Chinese healthy adult women appeared in the age group of 20-29 years (Northeast China(183.01±24.58) mg/cm 3, North China (188.93±24.80) mg/cm 3, East China (187.54±27.71) mg/cm 3, South China (186.22±33.72) mg/cm 3, Central China (176.33±24.91) mg/cm 3, Southwest China(182.25±28.00) mg/cm 3), and then it decreased with age. The level of BMD in different regions decreased with the age. Before the age of 70 years, BMD in Central and Southwest China was always at a low level((176.23±24.91) to (90.38±28.12) mg/cm 3, 182.25±28.00 to (88.55±25.68) mg/cm 3), lower than those in Northeast China ((183.01±24.58) to (99.69±27.85) mg/cm 3), North China ((188.93±24.80) to (95.89±26.12) mg/cm 3), East China ((187.54±27.71) to (95.65±27.86) mg/cm 3). After 70 years of age, BMD tended to be the same in different regions ( P>0.05). The BMD values in Central China and Southwest China were similar in the age group of 40-60 years ( P>0.05). The BMD values in the health adult femles in the age group of 60 years in different regions of Chinawere all lower than those of bone mass abnormality (all P<0.05). The detection rate of osteoporosis in females over 50 years was the highest in Southwest China (25.65%) and it was the lowest in North China (17.30%). Conclusions:This study establishes reference values of BMD under QCT in healthy Chinese women, which can be used as a reference basis for identifying women with low BMD who are at risk of osteoporosis. The BMD value is the lowest in Southwest China and the highest in South China.

Objective:To use quantitative computed tomography (QCT) technology to measure the bone mineral density of the spine of the Chinese healthy population, and to explore its correlation with hemoglobin and serum albumin.Methods:The data in this study came from the China Health Quantitative CT Big Data Project (China Biobank). The spine bone density was measured by using QCT Pro Image Analysis System and all cooperating centers used the European spine phantom (NO.145) for quality control. Total of 50 053 healthy persons who met the criteria for entry were selected as the research subjects. The subjects were divided into 7 groups according to age. The general data, spine bone density, serum albumin, hemoglobin of the subjects were collected. The single-factor analysis of variance, Pearson correlation analysis and multi-classification logistic regression model were applied to analyze the correlation between bone density and hemoglobin and serum albumin.Results:The bone mineral density of healthy people decreased with age ( P<0.05), and there were significant differences in hemoglobin, serum albumin and body mass index (BMI) among different age groups (all P<0.05). Linear correlation analysis showed that there were positive correlation between bone mineral density and hemoglobin in healthy males in different age groups ( r=0.086, 0.101, 0.076, 0.090, 0.072, 0.123, 0.100, all P<0.01). There were negative correlation between bone mineral density and hemoglobin in certain age groups in women (40-49 years group: r=-0.027; 70-79 yearsgroup: r=-0.077; both P<0.05). And corelation were found between bone mineral density and serum levels of albumin in certain age groups of healthy subjects (among men, 30-39 years group: r=-0.048; 40-49 years group, r=-0.027; 70-79 years group, r=-0.051; among women, 30-39 years group: r=-0.044; 40-49 years group, r=-0.042; 50-59 years group, r=-0.086; 70-79 years group, r=-0.070; all P<0.05). After adjusting for age and BMI, the multi-category logistic regression analysis showed that the hemoglobin level was protective factor of normal bone density ( OR=1.022, 95% CI:1.017-1.027) and decreased bone density ( OR=1.012, 95% CI:1.007-1.016) in healthy males, and the serum albumin was risk factor for normal bone density ( OR=0.926, 95% CI:0.905-0.948) and decreased bone density ( OR=1.006, 95% CI:0.951-1.011) in healthy women. Conclusion:There is a correlation between bone mineral density and hemoglobin and serum albumin in Chinese healthy population. Hemoglobin is a protective factor for bone mineral density in men, and serum albumin is a risk factor for bone mineral densityin women.