Objective To summarize the clinical effect of urethroplasty using acellular dermal matrix patch for the treatment of anterior urethral stricture caused by lichen sclerosus.Methods The clinical data was analyzed retrospectively from 15 patients with anterior urethral stricture caused by lichen sclerosus treated with aeellular dermal matrix patch.Results The patients were followed up for 8-40 months.The urethral silicone stent was removed 4 weeks after operation in 15 cases and all the patients voided well 2 months after operation.The urinary peak flow rates ranged from 17.6 to 41.7 ml/s(mean,28.6ml/s).Urethral stricture occurred in 2 patients 3 months after operation undergoing discontinuous dilatation within 3 to 6 months,the patients voided very well.Conclusion It is feasible,safe and relatively simple to use acellular dermal matrix patch for anterior urethral stricture caused by lichen sclerosus.

Objective To explore the feasibility and clinical efficacy of long-segmental bone defects after en bloc tumor resection of lower limb segment with composite of titanium alloy 3D printed prosthesis and vascularized fibular autograft and bioceramics.Methods 5 patients with lower extremity tumor (1 high grade chondrosarcoma,1 Ewing sarcoma,1 single metastatic tumor and 2 osteosarcoma) were treated by en bloc resection and precise reconstruction with segmental 3D-printed,custom-made prosthesis from August 2015 to November 2016,which composed of 1 male and 4 females,ranged from 16 to 56 years old,the average was 32± 19.3 years old.Three-dimensional computed tomography reconstructed images of patients' tumors were built before surgery.Custom-made prostheses were manufactured based on the patients' reconstructed images with micro-pores on the surface.After en bloc tumor resection with the help of osteotomy guide plate,the defects were reconstructed with 3D-printed,custom-made prostheses.Vascularized fibular autografts were put inside the prostheses,and the interval space among them was filled with bioceramics.Results All the 5 cases were performed surgical planning before the surgery with prosthesis and guide plate were designed at the same time.After verification of the finite element analysis SLM (2 cases) and the EBM (3 cases) were used to process prosthesis,and were designed into porous sharp with 210.98±66.16 mm in length and 26 901.76±12 903.96 mm3 in volume.Then the prosthesis would be cleaned and sterilized.All 5 operation were proceeded according to the plan of preoperative.The intra-operative guide plate were installed on the bone surface stably.The bone cutting was guided according to the plan of preoperative.By intra-operative frozen pathological examination,there were no malignant tissues in near and far marrow cavity.Unfolded fibular flap with 168.75±49.07 mm in length and porous tricalcium phosphate particle composite implants with 10±4.08 g were used in 4 cases and bone cement was used in 1 cases of metastatic tumor.The average operation time was 261±85 min and average blood loss was 540±182 ml.After a mean follow-up time of 6.4 months (1-15 months),all 5 cases survived with no local recurrence and pulmonary metastasis tumor.2 cases with vascular pedicle fibular transplant confirmed the survival of fibula via bone scan 3 months after operation.All cases were no infection,fractures,prosthesis loosening,except broken screw in 1 case.The Musculoskeletal Tumor Society (MSTS) 93 score was 17-26.Conclusion Long segment tubular titanium alloy 3D printed prosthesis with vascularized fibular autograft and bioceramics could reconstruct the segmental defects caused by tumor resection.

OBJECTIVETo explore the relationship between the lymph node metastasis and clinicopathological features in patients with clinical stage T1a non-small cell lung cancer (NSCLC).

METHODSClinicopathological data of a total of 418 patients who underwent lobectomy and systematic lymph node dissection were retrospectively analyzed. Logistic regression was used to analyze the relationship between lymph node metastasis and clinicopathological features.

RESULTSLymph node metastasis was observed in 25 patients. There were 122 patients who were diagnosed as ground glass opacity with no lymph node metastasis. 399 patients had subcarinal dissection, among them 7 patients were found to have lymph node metastasis. Univariate analysis showed that gender, smoking history, diameter of lymph node, ground glass opacity (GGO), differentiation of the tumor and tumor site were the factors affecting lymph node metastasis (all P < 0.05). Logistic regression analysis showed that diameter of lymph node, differentiation of the tumor and the site of lesion were independent risk factors for lymph node metastasis of NSCLC.

CONCLUSIONSTumor in the left lung, poor differentiation, and diameter of lymph nodes ≥ 1 cm on the preoperative CT image are independent risk factors for lymph node metastasis of NSCLC, hence we should pay attention before surgery and systematic lymph node dissection should be done. For patients with poor differentiation and lymph nodes ≥ 1 cm, subcarinal lymph nodes dissection is recommended for the sake of higher possibility of lymph node metastasis. For patients with ground glass opacity ≤ 2 cm, the lymph node metastasis is extremely rare, therefore, selective lymph node dissection is reconmmended.

Analysis of Variance ; Carcinoma, Non-Small-Cell Lung ; pathology ; secondary ; surgery ; Cell Differentiation ; Humans ; Logistic Models ; Lung Neoplasms ; pathology ; surgery ; Lymph Node Excision ; Lymph Nodes ; pathology ; Lymphatic Metastasis ; Neoplasm Staging ; Retrospective Studies ; Risk Factors ; Sex Factors ; Smoking

Objective:To explore the advantages of the novel individualized 3D printing artificial vertebral body in spine reconstruction and to evaluate its clinical effect.Methods:From January 2017 to December 2018, the 15 patients who underwent total vertebrectomy and spine reconstruction with individualized 3D printing artificial vertebral body were analyzed retrospectively. There were 8 males and 7 females, with the mean age 39.5 years (range: 20-57), including 12 primary tumors and 3 metastatic tumors. According to tumor location and surrounding soft tissue invasion range, simple posterior or combined anterior and posterior approach were used for total vertebral resection, and the defection was reconstructed by 3D printing artificial vertebral body. The operation time, intraoperative bleeding volume, postoperative stability of artificial vertebral body and bone ingrowth of adjacent vertebral body, preoperative and postoperative neurological changes, preoperative and postoperative VAS score, local control and survival of patients were analyzed.Results:The mean operation time was 412.0 min (range: 135-740 min), and the mean blood loss was 4 140.0ml (range: 100-14 000 ml). The mean follow-up time was 23.2 months (range: 12-35 months), and no one loss to follow-up. One case had pleural rupture, one case had cerebrospinal fluid leakage and one case had L5 nerve root palsy. All patients recovered after active symptomatic treatment. Compare with the preoperative VAS score (4.7±1.1), the differences of VAS score at 7 d postoperative and last follow-up (1.6±0.6 and 1.0±0.5) were significantly reduced ( P<0.001). Three patients with Frankel grade C gradually recovered to grade D, and no change were found in grade D and Grade E patients, there was no significant improved at last follow-up. Preliminary bone growth was found between the artificial vertebral body and the adjacent vertebral body 3 months after operation. The bone growth was more obvious at 12 months post-operation, and the artificial vertebral body fused with the adjacent vertebral bodies to form bone integration. At 24 months post-operation, the integration of the artificial vertebral body was more accurate. During the follow-up period, there was no loosening or displacement of the artificial vertebral body and no failure of internal fixation. A case of hemangioendothelioma and a case of epithelioid angiosarcoma died at 33 months and 35 months postoperatively. One patient with chondrosarcoma had local recurrence at16 months post-operation. After treated with arotinib, the tumor did not progress. The other 12 patients had no tumor recurrence or distant metastasis. Conclusion:After spinal tumor resection, individualized 3D printing artificial vertebral body can be used to accurate restoration of spinal continuity, and provide nice interface matching and bone growth between artificial vertebral body and the adjacent vertebral endplates. Moreover, the immediate and long-term stability of the artificial vertebral body can meet the needs of spinal reconstruction.

Objective:To evaluate the effectiveness of left ventricular assist device (LVAD)implantation via minimally invasive thoracotomy.Methods:From April 2022 to October 2023, we retrospectively collected and analyzed the perioperative data of 16 patients underwent LVAD via minimally invasive thoracotomy in our institute. 16 patients included 10 males and 6 females, the mean age was(58.6±7.6)(49-76)years old, BSA was (1.75±0.90)(1.35-2.01)m 2, 6 cases of dilated cardiomyopathy (DCM), 8 cases of ischemic cardiomyopathy (ICM) and 2 cases of end-stage valvular heart disease. LVAD type included 8 cases of CH-VAD, 7 cases of HeartCon and 1 case of Corheart-6. All the 16 patients underwent LVAD implantation were performed in condition of CPB, 13 patients on-beating heart, 3 patients with heart arrest. The outflow graft of 15 patients were place at ascending aorta, 1 patient was descending aorta. Results:The average surgical time was about 5.09 h, CPB time was(137±32)min, and the mechanical ventilation time was (20.8±13.6)h, stay in the ICU was(10.0±6.3)days, and the length of stay was(45.4±17.0)days. No case transition to sternotomy, no case in right ventricular failure, and no death case during 30 days.Conclusion:Minimally invasive thoracotomy approach is a safe and reliable method for left ventricular assist devices implantation, and can be used as a choice for LVAD implantation.

Objective To investigate whether elevated levels of C?reactive protein ( CRP ) and neutrophil (NE) in the blood is associated with an increased risk of lung cancer incidence. Methods From 2006 to 2007, all employees and retirees from Kailuan (Group) Limited liability Corporation were included in this Kailuan Cohort study. The last follow?up date was December 2015. Data on new cases of lung cancer were collected, and multivariable Cox proportional hazards regression models were used to the relationship between baseline CRP and NE at baseline and risk of lung cancer. Results A total of 92 735 participants were enrolled in this study. During the follow?up, 850 new cases of lung cancer were identified. All subjects were divided into four groups according to the combination level of CRP and NE at baseline: CRP≤3 mg／L and NE≤4×109／L(Group A), CRP≤3 mg／L and NE＞4×109／L( Group B), CRP＞3 mg／L and NE≤4× 109／L(Group C), CRP＞3 mg／L and NE＞4×109／L(Group D). The cumulative incidence of lung cancer were 950／100 000, 1 030／100 000, 1 081／100 000 and 1 596／100 000 in these four groups, respectively (P＜0.001 ). Multivariate Cox proportional risk model showed that participants from Group D had an significantly increased 72% risks of lung cancer when compared to Group A ( 95% CI: 1.40～2.12, P＜0.001). Stratified analyses gender showed that males in Group D had higher risk of lung cancer when compared with participants in Group A (HR＝1.73, 95% CI: 1.40～2.15,P＜0.001).Conclusion Elevated levels of CRP and NE might increase the risk of lung cancer.

Objective To investigate whether elevated levels of C?reactive protein ( CRP ) and neutrophil (NE) in the blood is associated with an increased risk of lung cancer incidence. Methods From 2006 to 2007, all employees and retirees from Kailuan (Group) Limited liability Corporation were included in this Kailuan Cohort study. The last follow?up date was December 2015. Data on new cases of lung cancer were collected, and multivariable Cox proportional hazards regression models were used to the relationship between baseline CRP and NE at baseline and risk of lung cancer. Results A total of 92 735 participants were enrolled in this study. During the follow?up, 850 new cases of lung cancer were identified. All subjects were divided into four groups according to the combination level of CRP and NE at baseline: CRP≤3 mg／L and NE≤4×109／L(Group A), CRP≤3 mg／L and NE＞4×109／L( Group B), CRP＞3 mg／L and NE≤4× 109／L(Group C), CRP＞3 mg／L and NE＞4×109／L(Group D). The cumulative incidence of lung cancer were 950／100 000, 1 030／100 000, 1 081／100 000 and 1 596／100 000 in these four groups, respectively (P＜0.001 ). Multivariate Cox proportional risk model showed that participants from Group D had an significantly increased 72% risks of lung cancer when compared to Group A ( 95% CI: 1.40～2.12, P＜0.001). Stratified analyses gender showed that males in Group D had higher risk of lung cancer when compared with participants in Group A (HR＝1.73, 95% CI: 1.40～2.15,P＜0.001).Conclusion Elevated levels of CRP and NE might increase the risk of lung cancer.

Objective     To summarize the effectiveness of Bentall procedure through the right anterior mini-incision. Methods    The clinical data of patients who underwent Bentall via right anterior mini-incision from September 2020 to September 2021 in the First Affiliated Hospital of Xi'an Jiaotong University were retrospectively analyzed. Results    A total of 14 males with an average age of 55.1±9.3 years and body mass index of 24.7±2.8 kg/m2 were enrolled. The cardiopulmonary bypass (CPB) time was 185.6±32.9 min, the aortic cross-clamping (ACC) time was 144.8±30.3 min, the ventilation time was 18.1±13.5 h, the time in the intensive care unit was 3.7±1.8 d, and the hospital stay time was 13.4±1.6 d. Postoperative complications occurred in 5 patients: 3 patients of pleural effusion, 1 patient of pericardial effusion and 1 patient of postoperative bleeding with secondary thoracotomy hemostasis. The median follow-up time was 4 (2, 6) months. There was no mortality in the hospital or during the follow-up. As for the learning curve, the ACC time, CPB time and operation time were significantly shortened after four cases (P<0.05). Conclusion    The right anterior mini-incision for Bentall operation is safe and effective, and has clinical value.

Objective: To explore the effect of C1q / tumor necrosis factor-related protein 9 ( CTRP9 ) on the expression of genes and proteins related to lipid metabolism of brown adipose tissue (BAT) in mice after cold stimulation． Methods : C57BL /6J male mice were injected with adenovirus Ad-GFP (control group) or Ad-CTRP9 ( experience group) into the scapular region and kept for 7 days．After cold stimulation at 4 ℃ for 10 hours，the expression levels of BAT marker genes and proteins were detected by real time PCR and Western blot. Results: Overexpression of CTRP9 induced by cold stimulation significantly increased the mRNA level of iodothyronine deiodinase 2 (Dio2) in BAT (P＜0. 01) ．Additionally，there was no significant difference in the expression of BAT marker genes ( UCP-1，PGC-1 α , PRDM16 and ARβ3) ，and liposynthesis and lipolysis related genes (PPARγ , HSL and ATGL) ．Uncoupling protein 1 (UCP-1) protein expression was upregualted in Ad-CTRP9 compared to the Ad-GFP control group ，while the expression of lipolysis related protein adipose triglyceride lipase ( ATGL) decreased significantly (P＜0. 05) ． Conclusion In cold environment，overexpression of CTRP9 promotes the accumulation of UCP-1 protein in BAT，upregulates the expression of thyroid hormone signal related gene Dio2，and inhibits triglyceride hydrolysis to maintain a constant body temperature.

Objective: To investigate whether elevated levels of C-reactive protein (CRP) and neutrophil (NE) in the blood is associated with an increased risk of lung cancer incidence. Methods: From 2006 to 2007, all employees and retirees from Kailuan (Group) Limited liability Corporation were included in this Kailuan Cohort study. The last follow-up date was December 2015. Data on new cases of lung cancer were collected, and multivariable Cox proportional hazards regression models were used to the relationship between baseline CRP and NE at baseline and risk of lung cancer. Results: A total of 92 735 participants were enrolled in this study. During the follow-up, 850 new cases of lung cancer were identified. All subjects were divided into four groups according to the combination level of CRP and NE at baseline: CRP≤3 mg/L and NE≤4×10⁹/L(Group A), CRP≤3 mg/L and NE>4×10⁹/L(Group B), CRP>3 mg/L and NE≤4×10⁹/L(Group C), CRP>3 mg/L and NE>4×10⁹/L(Group D). The cumulative incidence of lung cancer were 950/100 000, 1 030/100 000, 1 081/100 000 and 1 596/100 000 in these four groups, respectively (P<0.001). Multivariate Cox proportional risk model showed that participants from Group D had an significantly increased 72% risks of lung cancer when compared to Group A (95% CI: 1.40~2.12, P<0.001). Stratified analyses gender showed that males in Group D had higher risk of lung cancer when compared with participants in Group A (HR=1.73, 95% CI: 1.40~2.15, P<0.001). Conclusion Elevated levels of CRP and NE might increase the risk of lung cancer.