BackgroundObsessive-compulsive disorder （OCD） is a common neuropsychiatric illness and is listed as one of the top ten disabling conditions causing loss of income and reduced quality of life. Psychological distress is an important cause of anhedonia in OCD patients， and is closely related to psychosomatic symptoms. Therefore， exploring the role of anhedonia in the relationship between psychological distress and psychosomatic symptoms is of great significance for optimizing clinical psychological treatment protocols for OCD patients. ObjectiveTo explore the role of anhedonia in the relationship between psychological distress and psychosomatic symptoms in OCD patients， with the aim of providing references for managing psychosomatic symptoms in patients. MethodsA total of 90 patients who met the diagnostic criteria for OCD according to the International Classification of Diseases， tenth edition （ICD-10）， and who visited the Mental Health Center outpatient clinic of General Hospital of Ningxia Medical University from September 2023 to November 2024 were selected as the study objects. The instruments and techniques used for the evaluation were： Dimensional Anhedonia Rating Scale （DARS）， 10-item Kessler Psychological Distress Scale （K10） and Psychosomatic Symptom Scale （PSSS）. Model 4 of the Process for SPSS 26.0 was used to test the mediating role of anhedonia in the relationship between psychological distress and psychosomatic symptoms， with Bootstrapping used to assess the significance of mediating effect. ResultsA total of 84 patients （93.33%） completed the valid questionnaire. K10 score was positively correlated with PSSS total score， psychological symptom score and physical symptom score （r=0.559， 0.460， 0.551， P<0.01）. K10 score was negatively correlated with DARS total score （r=-0.527， P<0.01）. The total score of DARS was negatively correlated with PSSS total score （r=-0.497， P<0.01）. Anhedonia mediated the relationship between psychological distress and psychosomatic symptoms， with an indirect effect value was 0.148 （95% CI： 0.042~0.278）， accounting for 26.48% of the total effect. ConclusionPsychological distress can affect the psychosomatic symptoms in OCD patients both directly and indirectly via anhedonia.

Objective:To explore the clinical features, histopathological morphology, and differential diagnosis of lymphoepithelioma-like carcinoma with abnormal expression of follicular dendritic cell markers.Methods:From 2020 to 2021, 4 cases of lymphoepithelioma-like carcinoma with abnormal expression of follicular dendritic cell markers diagnosed in Fujian Cancer Hospital (2 cases) and the Second Affiliated Hospital of Fujian Medical University (2 cases) were collected. Different ancillary procedures such as HE, special stains, immunohistochemistry, and in situ hybridization techniques were used to assess the histopathological features and immunophenotypes. The clinical data were collected and literature was reviewed.Results:All 4 cases of lymphoepithelioma-like carcinoma with abnormal expression of follicular dendritic cell markers were male. They were 32, 45, 67 and 39 years old, respectively. The main clinical manifestations were bloody phlegm, abdominal pain, fatigue and anorexia. The clinical stages at diagnosis were stage Ⅳ (3 cases) and stage Ⅱ (1 case). Cases 2 and 3 had two pathological examinations at different sites, with a total of six pathological examinations. The histomorphology showed singly scattered or nests of tumor cells in a background of abundant small lymphocytes. The tumor cells were enlarged and pleomorphic, some appeared polygonal with inconspicuous cell borders, and they were arranged in a syncytial pattern. There were megakaryocytes, multinucleated tumor cells, and a few spindle-shaped cells seen. Atypical mitosis was commonly noted. By immunohistochemistry, the tumor cells were positive for CKpan(5/6), CK8/18(4/4), CAM5.2(2/5), CK-H(0/4), CK-L(3/4), EMA(4/5), CK5/6(3/6), p63(1/6), p40(1/6), E-cadherin (4/6), SSTR2(6/6), PD-L1(5/5), LCA(0/6), vimentin(5/6), CD2 (6/6), CD23(6/6), CD35(5/6), CXCL-13(4/5) and D2-40(1/5). The Ki-67 proliferative index was 60%-95%. In situ hybridization for EBER were all positive (6/6). Special stain for reticulin showed positive staining surrounding nests of tumor cells.Conclusions:The expression of follicular dendritic cell markers in lymphoepithelioma-like carcinoma is very rare, which may be related to EBV infection. Occasionally, it can overlap with follicular dendritic cell sarcoma by morphology and immunophenotype, which can lead to misdiagnosis. Only by combining clinical information, morphological characteristics and immunophenotype can an appropriate diagnosis be made.

Objective:To analyze the current employment status and the reasons for not engaging in general practice among general practice residents who completed training during 2018-2020.Methods:This study was a cross-sectional study. A questionnaire survey on the current employment was conducted among general practice residents who completed redidency training from 2018 to 2020, participants were selected by stratified random sampling in 57 training centers from each 5 provinces(municipalities) of the eastern, middle and western regions in China. The reasons for not engaging in general practice were investigated through telephone contact.Results:Of the 1 037 general practice residents who responded to the questionnaire, 677 residents(65.3%, 677/1 037) were engaged in general practice after training, while 360 residents(34.7%, 360/1 037) left general practice career or were awaiting employment. The three provinces with the highest proportion of residents leaving general practice career were Hubei(76.5%, 26/360), Sichuan(74.4%, 29/360) and Shandong provinces(59.6%, 28/360). There were significant differences in proportion of residents leaving general practice career after completing the training among eastern, middle and western regions(χ 2=42.911, P<0.001). A total of 261 participants(25.2%, 261/1 037) were engaged in non-general practice clinical career like internal medicine, surgery, gynecology, pediatrics or medical imaging; and the proportion in the eastern(27.3%, 67/245) and middle(33.3%, 106/318) regions was significantly higher thant that in the western region(18.6%, 88/474)(χ 2=6.855, P<0.05; χ 2=21.651, P<0.05). Among 259(71.9%, 259/360) participants who left general practice career, the main reasons were personal choice(63.3%, 164/259) or employers′ arrangement(22.4%, 58/259); the three provinces with the highest percentage of personal choice were Hubei(92.0%, 23/25), Sichuan(85.2%, 23/27) and Henan provinces(80.0%, 20/25). The proportion of personal choice in the middle region(82.4%, 84/102) was significantly higher than that in the eastern(52.1%, 37/71) and western(50.0%, 43/86) regions(χ 2=16.799, P<0.05; χ 2=20.830, P<0.05). The three provinces with the highest proportion of employers′ arrangement were Xinjiang Uygur Autonomous Region(66.7%, 22/33), Zhejiang province(9/13), and Inner Mongolia Autonomous Region(38.5%, 10/26). The proportion of employers′ arrangement in the western region(41.9%,36/86) was significantly higher than that in the eastern(18.3%, 13/71) and middle(8.8%, 9/102) regions(χ 2=8.980, P<0.05; χ 2=26.186, P<0.05). Conclusions:The majority of general practice residents are engaged in general practice after training. The proportion of residents who left the general practice career and the related reasons in different regions are not the same.

Objective To explore the causal relationship between myopia and specific immune cells through Mende-lian randomization(MR)analysis.Methods Data were mined from the Genome-Wide Association Studies(GWAS)data-base,and 731 immune cell characteristics were selected as exposure factors and myopia as the outcome factor.A signifi-cance threshold was established to filter single nucleotide polymorphisms(SNPs)significantly associated with immune cells and myopia,and the influence of weak instrument variable bias was eliminated.The primary analysis method employed was the inverse variance weighted(IVW)approach,supplemented by simple mode,weighted median,weighted mode,and MR-Egger regression for data analysis.The causal relationship between circulating immune cells and myopia was assessed using odds ratios(OR)and 95％confidence intervals.For the SNPs of immune cells that met the hypothesis,Cochran's Q test was used to evaluate heterogeneity,and MR-Egger regression and MR-PRESSO methods were employed to exclude hor-izontal pleiotropy.The leave-one-out analysis was utilized to assess whether significant results were driven by individual SNPs.To avoid reverse causal relationships,myopia was taken as the exposure variable and immune cell phenotypes as outcome variables in the reverse MR analysis.Additionally,multivariate Mendelian randomization(MVMR)was used to e-valuate the causal and independent effects of these immune cells on myopia.Results(1)The results from the two-sam-ple MR IVW method indicated that Memory B cell AC and CD24+CD27+AC(B cells)were protective factors against my-opia.In contrast,Naive CD8br％CD8br(T cells),CD39+CD8br AC(T cells),CD25 on CD39+activated Treg(T cells),PDL-1 on CD 14+CD 16+monocytes and CD80 on myeloid DC were identified as risk factors for myopia.These re-sults are consistent with those of MR-Egger and other methods.MR-Egger regression and MR-PRESSO analyses demonstra-ted that there was no horizontal pleiotropy(P＞0.05).(2)The reverse two-sample MR analysis revealed no bidirectional causal relationships between myopia and the aforementioned seven immune cells(all P＞0.05).(3)In the MVMR analysis,the significant causal relationship between CD80 on myeloid DC and myopia remained robust after adjusting for potential confounding variables.Conclusion This study reveals the complex causal relationships between various immune pheno-types and myopia through genetic methods,and demonstrates the intricate regulatory patterns of interactions between the immune system and myopia.

Objective:To survey the post competency of general practitioners who had completed residency training in China.Methods:This study was a cross-sectional survey. An online questionnaire survey was conducted among general practitioners, institution leaders and patients from January to February 2021. The participants were selected from 45 general practice residential training bases in the eastern, central and western regions of China by a combination of stratified sampling and proportional random sampling methods. The post competency self-assessment questionnaire was used for the general practitioners, and the competency evaluation questionnaire was used for institution leaders and the patients.Results:A total of 677 valid self-assessment questionnaires were returned from general practitioners, 600 from institution leaders, and 2 579 from patients. The professionalism and humanistic literacy of the self-assessment questionnaire had the highest score (4.41±0.60),and the teaching, learning and research abilities had the lowest score(3.57±0.84). There was no significant difference in the post competency score of general practitioners among different regions ( P>0.05). The highest score of general practitioners′ post competency evaluated by leaders was the professionalism and humanistic literacy (4.64±0.57), and the lowest one was the basic public health service ability (4.31±0.95). The score of professionalism and humanistic ability in the eastern region was significantly higher than that in the central and western regions ( P<0.05). The highest score of general practitioners′ post competency evaluated by patients was the professionalism and humanistic literacy (4.73±0.55), and the lowest score was the basic medical service ability (4.11±1.35). There were significant differences in scores of the ability for basic medical service, ability for basic public health service, ability for interpersonal communication and ability for professionalism and humanistic literacy among different regions ( P<0.05). For institution leaders, 68.2% (409/600) believed that the general practitioners were fully competent for their current jobs, 28.7% (172/600) believed that the general practitioners were basically competent for their current jobs. For patients, 70.5% (1 817/2 579) were very satisfied with the general practitioners′ service, and 27.1% (700/2 579) were basically satisfied with the general practitioners′ service. Conclusions:The competency of general practitioners who had received training in some provinces is basically up to standard, but the basic public health service ability and teaching, learning and research ability need to be improved.

This comprehensive review systematically explores the multifaceted applications, inherent challenges, and promising future directions of artificial intelligence (AI) within the medical domain. It meticulously examines AI's specific contributions to basic medical research, disease prevention, intelligent diagnosis, treatment, rehabilitation, nursing, and health management. Furthermore, the review delves into AI's innovative practices and pivotal roles in clinical trials, hospital administration, medical education, as well as the realms of medical ethics and policy formulation. Notably, the review identifies several key challenges confronting AI in healthcare, encompassing issues such as inadequate algorithm transparency, data privacy concerns, absent regulatory standards, and incomplete risk assessment frameworks. Looking ahead, the future trajectory of AI in healthcare encompasses enhancing algorithm interpretability, propelling generative AI applications, establishing robust data-sharing mechanisms, refining regulatory policies and standards, nurturing interdisciplinary talent, fostering collaboration among industry, academia, and medical institutions, and advancing inclusive, personalized precision medicine. Emphasizing the synergy between AI and emerging technologies like 5G, big data, and cloud computing, this review anticipates a new era of intelligent collaboration and inclusive sharing in healthcare. Through a multidimensional analysis, it presents a holistic overview of AI's medical applications and development prospects, catering to researchers, practitioners, and policymakers in the healthcare sector. Ultimately, this review aims to catalyze the deep integration and innovative deployment of AI technology in healthcare, thereby driving the sustainable advancement of smart healthcare.

Objective To explore the causal relationship between myopia and specific immune cells through Mende-lian randomization(MR)analysis.Methods Data were mined from the Genome-Wide Association Studies(GWAS)data-base,and 731 immune cell characteristics were selected as exposure factors and myopia as the outcome factor.A signifi-cance threshold was established to filter single nucleotide polymorphisms(SNPs)significantly associated with immune cells and myopia,and the influence of weak instrument variable bias was eliminated.The primary analysis method employed was the inverse variance weighted(IVW)approach,supplemented by simple mode,weighted median,weighted mode,and MR-Egger regression for data analysis.The causal relationship between circulating immune cells and myopia was assessed using odds ratios(OR)and 95％confidence intervals.For the SNPs of immune cells that met the hypothesis,Cochran's Q test was used to evaluate heterogeneity,and MR-Egger regression and MR-PRESSO methods were employed to exclude hor-izontal pleiotropy.The leave-one-out analysis was utilized to assess whether significant results were driven by individual SNPs.To avoid reverse causal relationships,myopia was taken as the exposure variable and immune cell phenotypes as outcome variables in the reverse MR analysis.Additionally,multivariate Mendelian randomization(MVMR)was used to e-valuate the causal and independent effects of these immune cells on myopia.Results(1)The results from the two-sam-ple MR IVW method indicated that Memory B cell AC and CD24+CD27+AC(B cells)were protective factors against my-opia.In contrast,Naive CD8br％CD8br(T cells),CD39+CD8br AC(T cells),CD25 on CD39+activated Treg(T cells),PDL-1 on CD 14+CD 16+monocytes and CD80 on myeloid DC were identified as risk factors for myopia.These re-sults are consistent with those of MR-Egger and other methods.MR-Egger regression and MR-PRESSO analyses demonstra-ted that there was no horizontal pleiotropy(P＞0.05).(2)The reverse two-sample MR analysis revealed no bidirectional causal relationships between myopia and the aforementioned seven immune cells(all P＞0.05).(3)In the MVMR analysis,the significant causal relationship between CD80 on myeloid DC and myopia remained robust after adjusting for potential confounding variables.Conclusion This study reveals the complex causal relationships between various immune pheno-types and myopia through genetic methods,and demonstrates the intricate regulatory patterns of interactions between the immune system and myopia.

Objective:To explore the clinical features, histopathological morphology, and differential diagnosis of lymphoepithelioma-like carcinoma with abnormal expression of follicular dendritic cell markers.Methods:From 2020 to 2021, 4 cases of lymphoepithelioma-like carcinoma with abnormal expression of follicular dendritic cell markers diagnosed in Fujian Cancer Hospital (2 cases) and the Second Affiliated Hospital of Fujian Medical University (2 cases) were collected. Different ancillary procedures such as HE, special stains, immunohistochemistry, and in situ hybridization techniques were used to assess the histopathological features and immunophenotypes. The clinical data were collected and literature was reviewed.Results:All 4 cases of lymphoepithelioma-like carcinoma with abnormal expression of follicular dendritic cell markers were male. They were 32, 45, 67 and 39 years old, respectively. The main clinical manifestations were bloody phlegm, abdominal pain, fatigue and anorexia. The clinical stages at diagnosis were stage Ⅳ (3 cases) and stage Ⅱ (1 case). Cases 2 and 3 had two pathological examinations at different sites, with a total of six pathological examinations. The histomorphology showed singly scattered or nests of tumor cells in a background of abundant small lymphocytes. The tumor cells were enlarged and pleomorphic, some appeared polygonal with inconspicuous cell borders, and they were arranged in a syncytial pattern. There were megakaryocytes, multinucleated tumor cells, and a few spindle-shaped cells seen. Atypical mitosis was commonly noted. By immunohistochemistry, the tumor cells were positive for CKpan(5/6), CK8/18(4/4), CAM5.2(2/5), CK-H(0/4), CK-L(3/4), EMA(4/5), CK5/6(3/6), p63(1/6), p40(1/6), E-cadherin (4/6), SSTR2(6/6), PD-L1(5/5), LCA(0/6), vimentin(5/6), CD2 (6/6), CD23(6/6), CD35(5/6), CXCL-13(4/5) and D2-40(1/5). The Ki-67 proliferative index was 60%-95%. In situ hybridization for EBER were all positive (6/6). Special stain for reticulin showed positive staining surrounding nests of tumor cells.Conclusions:The expression of follicular dendritic cell markers in lymphoepithelioma-like carcinoma is very rare, which may be related to EBV infection. Occasionally, it can overlap with follicular dendritic cell sarcoma by morphology and immunophenotype, which can lead to misdiagnosis. Only by combining clinical information, morphological characteristics and immunophenotype can an appropriate diagnosis be made.

Objective:To analyze the current employment status and the reasons for not engaging in general practice among general practice residents who completed training during 2018-2020.Methods:This study was a cross-sectional study. A questionnaire survey on the current employment was conducted among general practice residents who completed redidency training from 2018 to 2020, participants were selected by stratified random sampling in 57 training centers from each 5 provinces(municipalities) of the eastern, middle and western regions in China. The reasons for not engaging in general practice were investigated through telephone contact.Results:Of the 1 037 general practice residents who responded to the questionnaire, 677 residents(65.3%, 677/1 037) were engaged in general practice after training, while 360 residents(34.7%, 360/1 037) left general practice career or were awaiting employment. The three provinces with the highest proportion of residents leaving general practice career were Hubei(76.5%, 26/360), Sichuan(74.4%, 29/360) and Shandong provinces(59.6%, 28/360). There were significant differences in proportion of residents leaving general practice career after completing the training among eastern, middle and western regions(χ 2=42.911, P<0.001). A total of 261 participants(25.2%, 261/1 037) were engaged in non-general practice clinical career like internal medicine, surgery, gynecology, pediatrics or medical imaging; and the proportion in the eastern(27.3%, 67/245) and middle(33.3%, 106/318) regions was significantly higher thant that in the western region(18.6%, 88/474)(χ 2=6.855, P<0.05; χ 2=21.651, P<0.05). Among 259(71.9%, 259/360) participants who left general practice career, the main reasons were personal choice(63.3%, 164/259) or employers′ arrangement(22.4%, 58/259); the three provinces with the highest percentage of personal choice were Hubei(92.0%, 23/25), Sichuan(85.2%, 23/27) and Henan provinces(80.0%, 20/25). The proportion of personal choice in the middle region(82.4%, 84/102) was significantly higher than that in the eastern(52.1%, 37/71) and western(50.0%, 43/86) regions(χ 2=16.799, P<0.05; χ 2=20.830, P<0.05). The three provinces with the highest proportion of employers′ arrangement were Xinjiang Uygur Autonomous Region(66.7%, 22/33), Zhejiang province(9/13), and Inner Mongolia Autonomous Region(38.5%, 10/26). The proportion of employers′ arrangement in the western region(41.9%,36/86) was significantly higher than that in the eastern(18.3%, 13/71) and middle(8.8%, 9/102) regions(χ 2=8.980, P<0.05; χ 2=26.186, P<0.05). Conclusions:The majority of general practice residents are engaged in general practice after training. The proportion of residents who left the general practice career and the related reasons in different regions are not the same.

Objective:To survey the post competency of general practitioners who had completed residency training in China.Methods:This study was a cross-sectional survey. An online questionnaire survey was conducted among general practitioners, institution leaders and patients from January to February 2021. The participants were selected from 45 general practice residential training bases in the eastern, central and western regions of China by a combination of stratified sampling and proportional random sampling methods. The post competency self-assessment questionnaire was used for the general practitioners, and the competency evaluation questionnaire was used for institution leaders and the patients.Results:A total of 677 valid self-assessment questionnaires were returned from general practitioners, 600 from institution leaders, and 2 579 from patients. The professionalism and humanistic literacy of the self-assessment questionnaire had the highest score (4.41±0.60),and the teaching, learning and research abilities had the lowest score(3.57±0.84). There was no significant difference in the post competency score of general practitioners among different regions ( P>0.05). The highest score of general practitioners′ post competency evaluated by leaders was the professionalism and humanistic literacy (4.64±0.57), and the lowest one was the basic public health service ability (4.31±0.95). The score of professionalism and humanistic ability in the eastern region was significantly higher than that in the central and western regions ( P<0.05). The highest score of general practitioners′ post competency evaluated by patients was the professionalism and humanistic literacy (4.73±0.55), and the lowest score was the basic medical service ability (4.11±1.35). There were significant differences in scores of the ability for basic medical service, ability for basic public health service, ability for interpersonal communication and ability for professionalism and humanistic literacy among different regions ( P<0.05). For institution leaders, 68.2% (409/600) believed that the general practitioners were fully competent for their current jobs, 28.7% (172/600) believed that the general practitioners were basically competent for their current jobs. For patients, 70.5% (1 817/2 579) were very satisfied with the general practitioners′ service, and 27.1% (700/2 579) were basically satisfied with the general practitioners′ service. Conclusions:The competency of general practitioners who had received training in some provinces is basically up to standard, but the basic public health service ability and teaching, learning and research ability need to be improved.