Objective:To investigate the association of XPD rs13181 (codon751A/C, Lys751Gln), rs238406 (codon156C/A, Arg156Arg), XPC rs2279017 (i11C/A), and XRCC4 rs3734091 (codon247T/C, Ala247Ser) polymorphisms with colorectal cancer (CRC) susceptibility. Methods:A total of 338 patients with CRC who were treated at the Beijing Cancer Hospital from April 2013 to January 2016 (case group) and 315 healthy controls (control group) were genotyped using TaqMan technology. Results:The genotype GT and G alleles of XPD rs13181 increased the risk of CRC (GT>TT, adjusted OR=1.69, 95%CI=1.15-2.47, P=0.007;G>T, adjusted OR=1.77, 95%CI=1.19-2.64, P=0.005). The genotype GT and T alleles of XRCC4 rs3734091 increased the susceptibility of CRC (GT>GG, adjusted OR=9.02, 95%CI=5.61-14.50, P<0.001;T>G, adjusted OR=4.06, 95%CI=2.49-6.61, P<0.001). Analyses of XPD rs13181 and rs238406 indicated that the haplotype GT significantly decreased the risk of CRC (adjusted OR=0.39, 95%CI=0.18-0.85, P=0.018). Moreover, the combinations of the XPC rs2279017 G allele and the XRCC4 rs3734091 T allele (adjusted OR=28.43, 95%CI=6.85-117.95, P<0.001) and the XPD rs13181 G allele and the XRCC4 rs3734091 T allele (adjusted OR=10.24, 95%CI=4.69-22.35, P<0.001) exhibited significantly increased CRC risk. Conclusion:The polymorphisms of XPD rs13181 and XRCC4 rs3734091 increased the risk of CRC.

Objective To explore the clinical features, imaging and their diagnosis vaule of Baló's concentric sclerosis (BCS). Methods The clinical manifestation, laboratory examination, neuroimaging characteristics, pathology and follow-up of 12 (2 outpatients and 10 inpatients) cases of BCS were analyzed retrospectively. Results The onset age of 12 patients (male 4, female 8) ranged from 8 to 54 years old (mean 36.8 years). Unconcerned and slowness response were common in the disease onset (7 cases).Other symptoms and signs such as hypophrenia ( 10 cases), limitation of limb or hand movement (8 cases),urinary and fecal incontinence (7 cases), hypo-myodynamia (7 cases), positive pyramidal sign (6 cases)were not rare in course of disease. Eight cases underwent the examination of cerebrospinal fluid myelin basic protein, which increased in 7 cases. Demyelinating change and perivascular inflammatory infiltration were shown in 6 brain biopsies. The involvements of multi-lesions were found in 11 cases. Four patients underwent CT scanning and all the cases showed with hypodense lesions and couldn' t be enhanced. On MRI, all cases appeared round or round-like in shape. Enhanced lesions showed ring-like or half-ting-like shape (8 cases) and concentric ring (3 cases). It's easy to be misdiagnosed as brain tumor (8 cases).Conclusions BCS is a kind of demyelinating disease of subacute or chronic onset accompanied with cognitive disorder being the most common initiating symptoms. It's prone to be misdiagnosed. Diagnosis depends on MRI and corticosteroid treatment is effective. BCS has a good prognosis and presents with benign clinical course.

A theoretical model for the magnetic forces on ferromagnetic drug particles in a guiding magnetic field is established with the consideration of the electromagnetic field theory. Our model shows that the ferromagnetic drug particles can concentrate on the targeted area with the guidance of the outside magnetic field. Both the distribution of the intensity of the guiding magnetic field and the forces on ferromagnetic drug particles are studied numerically. The theoretical results are in good agreement with the experimental results reported recently.

Objective To investigate the changes of thyroid function and carotid atherosclerosis in patients on maintenance hemodialysis (MHD).Methods A total of 110 stable MHD patients undergoing hemodialysis for at least three months were enrolled in the study.Serum free-T3 (FT3), free-T4 (FT4) and thyroid stimulating hormone (TSH) concentrations were measured by electrochemiluminescence.Plasma levels of homocysteine (Hcy) and C-reactive protein (CRP) were detected.Clinical data and biochemical indicators were collected.These patients were divided into thyroid dysfunction group and euthyroidism group.Prevalence of atherosclerosis was detected by carotid ultrasonography.The associations between the changes of thyroid function and carotid atherosclerosis were analyzed by Logistic regression model.Results Among these 110 patients, 42 (38.18％) patients had thyroid dysfunction.Hcy and CRP concentrations were significantly higher in thyroid dysfunction group than those in euthyroidism group (P ＜ 0.05).The intima-media thickness, number of plague and arteriostenosis of carotid were higher in thyroid dysfunction group than those in euthyroidism group (P ＜ 0.05).Multivariate logistic regression analysis showed that increased Hcy and CRP, decreased serum FT3 were independent risk factors for carotid atherosclerosis.Conclusions Thyroid dysfunction with low serum FT3 is frequently found in MHD patients.In MHD patients, FT3 is closely correlated to carotid atherosclerosis.

BACKGROUND: Recently, the detectable rate of ground-glass opacity (GGO ) was significantly increased, a appropriate diagnosis before clinic treatment tends to be important for patients with GGO lesions. The aim of this study is to validate the ability of the mean computed tomography (m-CT) value to predict tumor invasiveness, and compared with other measurements such as Max CT value, GGO size, solid size of GGO and C/T ratio (consolid/tumor ratio, C/T) to find out the best measurement to predict tumor invasiveness. METHODS: A retrospective study was conducted of 129 patients who recieved lobectomy and were pathological confirmed as atypical adenomatous pyperplasia (AAH) or clinical stage Ia lung cance in our center between January 2012 and December 2013. Of those 129 patients, the number of patients of AAH, AIS, AIS and invasive adenocarcinoma were 43, 26, 17 and 43, respectively. We defined AAH and AIS as noninvasive cancer (NC), MIA and invasive adenocarcinoma were categorized as invasive cancer(IC). We used receiver operating characteristic (ROC) curve analysis to compare the ability to predict tumor invasiveness between m-CT value, consolidation/tumor ratio, tumor size and solid size of tumor. Multiple logistic regression analyses were performed to determine the independent variables for prediction of pathologic more invasive lung cancer. RESULTS: 129 patients were enrolled in our study (59 male and 70 female), the patients were a median age of (62.0±8.6) years (range, 44 to 82 years). The two groups were similar in terms of age, sex, differentiation (P>0.05). ROC curve analysis was performed to determine the appropriate cutoff value and area under the cure (AUC). The cutoff value of solid tumor size, tumor size, C/T ratio, m-CT value and Max CT value were 9.4 mm, 15.3 mm, 47.5%, -469.0 HU and -35.0 HU, respectively. The AUC of those variate were 0.89, 0.79, 0.82, 0.90, 0.85, respectively. When compared the clinical and radiologic data between two groups, we found the IC group was strongly associated with a high m-CT value, high Max CT value, high C/T ratio and large tumor size. Gender, solid tumor size, tumor size, C/T ratio, m-CT value and MaxCT value were selected factor for multivariate analysis, when using the preoperatively determined variables to predict the tumor invasiveness, revealed that tumor size, C/T ratio, m-CT value and Max CT value were independent predictive factors of IC. CONCLUSIONS The musurements of Max CT value, GGO size, solid size of GGO and C/T ratio were significantly correlated with tumor invasiveness, and the evaluation of m-CT value is most useful musurement in predicting more invasive lung cancer.
Adenocarcinoma ; diagnosis ; diagnostic imaging ; mortality ; pathology ; Adult ; Aged ; Female ; Humans ; Lung Neoplasms ; diagnosis ; diagnostic imaging ; mortality ; pathology ; Male ; Middle Aged ; Neoplasm Invasiveness ; Neoplasm Staging ; ROC Curve ; Retrospective Studies ; Tomography, X-Ray Computed ; methods

（正）目前对于可切除食管癌的治疗方式是以手术为主的综合治疗[1]。微创食管癌手术经过多年的发展和普及，其远近期疗效已被广泛认可。目前对于中、下段食管癌，胸腹腔镜联合 Ivor-Lewis 已是主流术式[2]。相对微创 McKeown 手术，全腔镜下Ivor-Lewis 食管癌根治术在近期疗效（特别是在吻合口瘘、吻合口狭窄和喉返神经损伤）方面具有明显优势[3]。本视频旨在展示全腔镜下 Ivor-Lewis 食管癌根治术的手术入路及操作要点。

Femoral neck fracture (FNF) in the elderly patients is currently a major health challenge worldwide, with excessive consumption of medical resources, high incidence of complications as well as suboptimal outcome and prognosis. Hip joint arthroplasty (HJA) has been the mainstream treatment for FNF in the elderly, but the conventional surgical approaches and techniques are still confronted with a series of bottlenecks such as dislocation, limp and limb length discrepancy. In recent years, direct anterior approach (DAA) for HJA (DAA-HJA) has been a major new choice in the field of joint replacement, which achieves improved clinical effectiveness of HJA in the treatment of elderly FNF, due to the fact that DAA approach involves the neuromuscular interface and accords with the idea of soft tissue retention and enhanced recovery after surgery. However, there is still a lack of unified understanding of standard technique and procedure of DAA-HJA in the treatment of elderly FNF. Therefore, relevant experts from the Hip Joint Group of Chinese Orthopedics Association of Chinese Medical Association, Youth Arthrology Group of Orthopedic Committee of PLA, Orthopedic Committee of Chongqing Medical Association, Branch of Orthopedic Surgeons of Chongqing Medical Doctor Association and Sport Medicine Committee of Chongqing Medical Association were organized to formulate the " Chinese expert consensus on the technical standard of direct anterior hip arthroplasty for elderly femoral neck fracture ( version 2023)" based on evidence-based medicine. This consensus mainly proposed 13 recommendations covering indications, surgical plans, prosthesis selections, surgical techniques and processes, and postoperative management of DAA-HJA in elderly patients with FNF, aiming to promote standardized, systematic and patient-specific diagnosis and treatment to improve the functional prognosis of the patients.