Research progress of pathogenesis and treatment of type Ⅲ acute acquired concomitant esotropia / 眼科新进展

Type Ⅲ acute acquired concomitant esotropia(AACE)often occurs in myopic patients after adolescence.Its exact mechanism is unclear,but it may be related to myopia,convergence-divergence imbalance,overregulation,de-compensation of esotropia,abnormal anatomical structure,and visual center dysfunction.Currently,the main treatment methods include surgery,creotoxin injection,triple prism correction,and visual function training.This article provides a comprehensive review of the pathogenesis and treatment progress of type Ⅲ AACE.

Mechanism of treating hyperlipidemia with Ningzhi capsule based on network pharmacology and molecular docking technology / 基础医学与临床

Objective To screen the potential pharmacological targets of Ningzhi capsule,a lipid-lowering tradi-tional Chinese medicine,and explore its mechanism of effect.Methods The components and predicted targets of Ningzhi capsule′s constituent drugs were obtained from BATMAN-TCM database.Hyperlipidemia-related targets were obtained from DisGeNET and GeneCards databases.The Venny2.1.0 tool was used to map drug targets and disease targets to obtain common targets as potential pharmacological targets.Protein-protein interaction analysis(STRING),gene ontology and pathway enrichment analysis(DAVID)were performed for the common targets.Finally,Swiss dock was used for molecular docking verification.Results A total of 1 432 predicted targets of Ning-zhi capsule and 87 targets related to hyperlipidemia were found and 32 common targets were screened which covered 64 potential pharmacological ingredients of Ningzhi capsule.Potential pharmacological targets were most abundant for turmeric root-tuber,turmeric and cattail pollen,and potential pharmacological ingredients were most abundant for sickle senna seed,turmeric and turmeric root-tuber.Apolipoprotein E(APOE),nitric oxide synthase 3(NOS3)and peroxisome proliferator activated receptor alpha(PPARA)had the highest hyperlipidemia correlation scores and more protein interactions,which were potential core targets.The biological processes related to DNA transcription were significantly enriched.Cholesterol metabolism,cGMP-PKG and PPAR signaling pathways were involved with APOE,NOS3 and PPARA,respectively.Molecular docking showed good binding activity.Conclusions There are many potential pharmacological ingredients of Ningzhi capsule and the key components for lowering lipids include turmeric root-tuber,turmeric,cattail pollen and sickle senna seed.APOE,NOS3 and PPARA are believed to be the key targets for lowering lipids with potential mechanism related to cholesterol metabo-lism,cGMP-PKG and PPAR signaling pathways.

Advances in the research of lateral flow assays applied in detecting disease biomarkers / 中华检验医学杂志

Biomarkers is of great significance for clinical diagnosis. Lateral flow assay (LFA) is a test method which developed based on paper chromatography and has a wide range of applications in testing disease biomarkers. The current researches of LFA mainly focus on the detection specificity, precision and sensitivity, as well as multiple detection of disease markers or simultaneous detection of multiple diseases. This artical reviews the systemic design, working principles of LFA along with the application research of LFA in detecting disease markers, in order to provide reference for development and application of LFA.

A Preliminary Study on the Construction and Visualization of Knowledge Graph for the Ancient Chinese Medical Book Ling Shu / 广州中医药大学学报

Objective To explore the construction and visualization for knowledge graph of Ling Shu(Spiritual Pivot),with a view to providing ideas for the structured storage and display of the theoretical knowledge of the ancient Chinese medical books.Methods Using the professional idea of constructing knowledge graphs for reference,text mining technology was applied to construct the thesaurus,and then word division,entity recognition,and relationship extraction for the original text of Ling Shu were performed to get the elements of knowledge graph construction.The graph database Neo4j was used for the storage and query of the knowledge graph,and then the visual display of the knowledge graph was achieved.Results The 1 216 high-quality words consisting of the thesaurus of Ling Shu were obtained,and the construction of the knowledge graph of the theory of Ling Shu was realized.The constructed knowledge graph basically displayed the traditional Chinese medicine theories such as the correlation of visceral manifestations with essence qi,and the relationship between emotions and the five-zang organs described in Ling Shu,which made the retrieval and utilization of the related entities and relationships possible,and provided ideas for the structured storage and display of the theoretical knowledge of the ancient books of Chinese medicine.Conclusion The knowledge graph construction technology can be used to obtain the Chinese medicine theoretical knowledge graph of Ling Shu,and to display the knowledge connections of yin-yang and the five elements,and the internal organs and meridians expressed in the Ling Shu.The construction of the knowledge graph and its storage in the graph database enable the knowledge graph involved in the text of Ling Shu to be displayed in the form of visualized semantic network graph,and also make the embedding of other search systems such as the semantic search and semantic wiki possible,which will be helpful for the development of Chinese medicine intelligent medical services.

Arthroscopic treatment of sternoclavicular joint osteoarthritis / 中华胸心血管外科杂志

Objective:To report the results of a study of 7 patients with osteoarthritis who underwent arthroscopic sternoclavicular arthroplasty in response to conservative treatment.Methods:Arthroscopic sternoclavicular arthroplasty was performed in 7 patients with sternoclavicular osteoarthritis. There were 3 males and 4 females.The age ranges from 34 to 62, with an average age of 43. Patients were evaluated before surgery and at follow-up using the Constant score and Rockwood sternoclavicular joint score system. The postoperative follow-up lasted from 1 to 10 months, with an average of 3.7 months. The surgery was performed under general anesthesia without shoulder joint fixation.Results:All patients recovered preoperative function or full activity within 2 weeks after operation. At the last follow-up, 6 patients had no pain and 1 had mild tension after activity. The median Constant score increased from 69.6 (62-80) to 94.3 (88-96); The median Rockwood score increased from 5.7 (on a scale of 3 to 8) to 14.3 (on a scale of 12 to 15)(maximum 15). Clinical efficacy: All 7 cases were excellent (13-15 points). There were no complications, especially no problems with joint stability.Conclusion:Arthroscopic sternoclavicular arthroplasty is a new method for the treatment of sternoclavicular osteoarthritis which failed to respond to conservative treatment.

Herniation of intervertebral disc into thoracolumbar fracture vertebral body leads to malunion of fracture and decrease of intervertebral space height / 中国骨伤

OBJECTIVE@#To analyze the clinical characteristics of intervertebral disc tissue injury and herniation into the vertebral body in thoracolumbar fracture on fracture healing, vertebral bone defect volume and intervertebral space height.@*METHODS@#From April 2016 to April 2020, a total of 140 patients with thoracolumbar single vertebral fracture combined with upper intervertebral disc injury treated with pedicle screw rod system reduction and internal fixation in our hospital. There were 83 males and 57 females, aged from 19 to 58 years old, with an average age of (39.33±10.26) years old. All patients were followed up regularly 6 months, 12 months and 18 months after surgery. The patients with injured intervertebral disc tissue not herniated into the fractured vertebral body were the control group, and the patients with injured intervertebral disc and herniated into the fractured vertebral body were the observation group. By detecting the thoracolumbar AP and lateral X-ray films, CT and MRI of the thoracolumbar segment at different follow-up time, calculate the changes of the wedge angle of the fractured vertebral body, the sagittal kyphosis angle and the height of the superior adjacent intervertebral space, the changes of the fracture healing and bone defect volume after the reduction of the vertebral body, and the changes of the intervertebral disc degeneration grade. The prognosis was evaluated by visual analogue scale(VAS) and Oswestry disability index(ODI). Finally, the differences of the above results among different groups were comprehensively analyzed.@*RESULTS@#All the patients had normal wound healing without complications. A total of 87 patients received complete follow-up data, at least 18 months after internal fixation. Thoracolumbar AP and lateral X-ray films showed that 18 months after the reduction and internal fixation operation, the vertebral wedge angle, sagittal kyphosis angle and the height of the upper adjacent intervertebral space in the observation group were greater than those in the control group(P<0.05). CT scanning showed that the deformity of the fracture healed 12 months after the vertebral body reduction in the observation group and formed a "cavity" of bone defect connected with the intervertebral space, and its volume was significantly increased compared with that before (P<0.05). MRI scanning showed that the degeneration rate of injured intervertebral discs in the observation group was more serious than that in the control group 12 months after operation(P<0.05). However, there was no significant difference in VAS and ODI score at each time.@*CONCLUSION@#Herniation of injured intervertebral disc tissue hernias into the fractured vertebral body leads to increased bone resorption defect volume around the fracture and forms a malunion "cavity" connected with the intervertebral space. This may be the main reason for the change of vertebral wedge angle, the increase of sagittal kyphosis angle and the decrease of intervertebral space height after removal of internal fixation devices.

Amantadine Surface-Modified Silver Nanorods Improves Immunotherapy of HIV Vaccine Against HIV-Infected Cells.

Surface modifications can endow nanomaterials with presupposed immunoregulatory functions to optimize vaccine-induced immune responses. In this work, we modified an immunoregulatory molecule, amantadine (Ada), on the outermost layer of PVP-PEG-coated silver nanorods (Ada-PVP-PEG silver nanorods). Such Ada surface-modified silver nanorods promote HIV vaccine-triggered cytotoxic lymphocytes (CTLs) to produce around eightfold stronger tumor necrosis factor alpha (TNF-α) in vivo. The enhancement of HIV-specific CTL-derived TNF-α significantly facilitates the death of HIV-infected cells (from 28.86 to 84.19%) and reduces HIV production (around sixfold). This work supports the critical role of surface modifications of nanomaterials in fundamentally improving the immunotherapy of HIV vaccine against HIV-infected cells.

Establishment of calcium-activated chloride channel -based second messenger Ca / 解剖学报

Objective To establish a cell model based on calcium-activated chloride channel (CaCC) that could sensitively detect the second messenger Ca

Effect of thyroxine level on gestational diabetes mellitus and pregnancy outcome / 解放军医学杂志

Objective: To investigate the effect of thyroxine level on the onset of gestational diabetes mellitus (GDM), pregnancy outcome and the basic conditions of neonates. Methods: The related information of 1903 cases of pregnant women were prospectively collected from the Department of Obstetrics, Shanghai Changhai Hospital. Selecting group A (gravida with low thyroxinemia, n=36), group B (gravida with pure thyroid peroxidase antibody (TPOAb) positive, n=113) and group C (gravida with normal thyroid function, n=1539) according to the results of thyroid function test in newly constructed card. The incidence of GDM and the related index of thyroid function and glucose metabolism during the second trimester of pregnancy were compared among the three groups. Gravida with GDM in the three groups were group D (9 cases), group E (32 cases) and group F (367 cases), respectively. The differences of pregnancy outcome and the basic conditions of neonates among them were compared. Results: No significant differences existed (P>0.05) in the incidence of GDM during different pregnant period in groups A, B and C (First trimester: 50.00% vs. 25.00% vs. 34.69%; Second trimester: 21.88% vs. 28.71% vs. 22.70%). In the second trimester, the level of glycosylated hemoglobin (HbA1c) was significantly higher in group A than in group C [4.80%(4.60%, 5.00%) vs. 4.70%(4.40%, 4.90%)], w hi le the fasting glucose level was significantly higher in group B than those in group C [(4.69±0.59) mmol/L vs. (4.58±0.43) mmol/L, P0.05). Conclusions: Different levels of thyroxine have no significant effect on the incidence of GDM, but throw some effects on the glucose metabolism in the second trimester. In addition, positive TPOAb may increase the incidence of premature delivery and fetal distress in pregnant women with GDM, and affect fetal growth and development to some extent. Thyroid function status should be evaluated in the early stages of pregnancy, and regular follow-up should be conducted for patients with TPOAb positivity and timely intervention if necessary.

Effect of microvascular invasion on long-term prognosis of liver resection for multiple hepatocellular carcinomas / 医学研究生学报

ObjectiveOnly few studies have been published of the effect of microvascular invasion (MVI) on long-term prognosis of liver resection (LR) for multiple hepatocellular carcinomas (mHCCs). Therefore, we investigate the efficacy of MVI on long-term prognosis of the patients undergoing LR formHCCs.MethodsThe clinical data of 505 patients undergoing LR for mHCCs in the Eastern Hepatobiliary Surgery Hospital of the Second Military Medical University between March 2009 and March 2015 were retrospectively analyzed. Patients were divided into the MVI(+) group （n=279）and MVI (-) group (n=226), and146 patients in MVI (+) group and 124 patients in MVI (-) group received adjuvant transarterial chemoembolization (TACE). The Kaplan-Meier approach was used for survival analysis and the Cox proportional-hazards regression model was used forthe risk factors of long-term survival rate.ResultsThe early recurrence rate of MVI (+) group was significantly higher than that of MVI (-) group (60.4% vs 40.5%, P<0.01), and the 1-, 3-, 5-year overall survival rate of MVI (+) group was significantly lower than those in MVI (-) group (70.5%, 47.4%, 33.4% vs 86.6%, 66.8%, 50.1%, P<0.05). Among MVI (+) patients, the early recurrence rate and 1-, 3-, 5-year overall survival rate in the adjuvant TACE group were better than those in the control group (early recurrence rate 41.3% vs 39.3%, P<0.05; 1, 3, 5 year overall survival rate 92.8%, 72.5%, 53.1% vs 78.6%, 59.5%, 47.3%, P<0.05). Multivariate Cox model indicated that the Alpha-foetoprotein (AFP) level, maximum tumor diameter/minimum tumor diameter, MVI and adjuvant TACE were independent risk factors for early recurrence (HR=1.48, 1.51, 1.34, 0.76, P<0.05); maximum tumor diameter, intraoperative blood transfusion, MVI and adjuvant TACE were independent risk factors for postoperative overall survival (HR=1.75, 1.75, 1.36, 0.68, P<0.05).ConclusionMVI is a risk factor for early recurrence and poor long-term prognosis after LR for mHCCs. For mHCCs with MVI, adjuvant TACE after LR could reduce the early recurrence rate and improve the long-term survival rate.

Value of Serum Tumor Marker Isocitrate Dehydrogenase 1 in the Diagnosis of Lung Cancer / 中国医学科学院学报

To investigate the clinical value of serum tumor marker isocitrate dehydrogenase 1(IDH1)in the diagnosis of lung cancer. The general data were collected in lung cancer patients and non-lung cancer patients.The serum level of IDH1 was detected by enzyme-linked immunosorbent assay to evaluate its clinical significance in diagnosing lung cancer. The serum IDH1 level was significantly higher in lung cancer patients than in non-lung cancer patients [(7.12±6.98)ng/ml (2.09±1.83)ng/ml,=11.540,<0.001].The serum IDH1 level in patients with adenocarcinoma or squamous cell carcinoma was significantly higher than that in patients with small cell lung cancer [(7.91±7.26)ng/ml (2.76±2.27)ng/ml, =6.345,<0.001].The sensitivity of IDH1 in detecting lung cancer,stage Ⅰ/Ⅱ lung cancer,and stage Ⅲ/Ⅳ lung cancer was 47.4%,49.1%,and 46.3%,respectively. Serum IDH1 has high sensitivities and specificities in the diagnosis and differential diagnosis of non-small cell lung cancer(squamous cell carcinoma and adenocarcinoma)and small cell lung cancer as well as the auxiliary diagnosis of stage Ⅰ and Ⅱ lung cancer.It is a valuable marker for the auxiliary diagnosis of lung cancer.

Resection of rib tumors by video-assisted thoracoscopic surgery(24 case reports) / 中华胸心血管外科杂志

Objective To explore the possibility of minimally invasive resection of chest wall tumor by video-assisted tho-racoscopic surgery( VATS) .Methods Retrospective analysis of 24 cases of chest wall tumors with minimally invasive resec-tion by VATS from June 2013 to May 2017, including 13 cases of bone fibrous dysplasia, 7 cases of rib abnormal hyperplasia of fiber, 2 cases of cartilaginous tumor, 1 case of Langerhans histiocytosis and 1 case of extramedullary single plasma cell tumor.3 cases with C arm positioning in operation and 4 cases with computer navigation and positioning .Results 24 cases of rib tumors were successfully removed .No surgical death and serious complications occurred in this group .All patients followed up 1-3 years, there is no recurrence.Conclusion Resection of rib tumors with VATS can bring precise resection and lead to minimally invasive.

The utility of 3D printing for implant design for rib fracture fixation / 中华胸心血管外科杂志

Objective 3D printing has been used in the assistanceof surgical planning and the development of personal-ized prostheses.This study was to determine the feasibility of using a 3D printer for the purpose of producing personalized pros-theses for complex rib fracture fixation .Methods Using data from a high-resolution CT scan of 10 ribs of 3 cases with rib frac-ture, rib moldswere generated with computer software and fabricated with the 3D printer using the fused deposition modeling method.The 3D printing molds were used for custom-designed titanium plate.Results The average length of the 3D models of ribs is 8.45 cm.The mean time of fabricating models was 18.8 minutes and 4.6 gram polylactic acid was consuming on aver-age.The mean error of dimension of 3D models is less than 0.2 mm.Reshaping plates spends 3.3 minutes on average.Radio-logical follow-up for bothcases demonstrated successful fixation at 3 months.Conclusion These cases demonstrate the feasibili-ty of the use of 3D modeling and printing to develop personalizedplates and can ease the difficulty of complex rib fracture .

Glucose metabolism in hospitalized patients: A retrospective analysis of 1 726 cases / 第二军医大学学报

Objective To analyze the blood glucose levels and related data of inpatients of different clinical departments, so as to provide a basis for normalized management of blood glucose in hospital. Methods Medical records of 1 726 discharged patients from 9 different clinical departments of Changhai Hospital in November 2014 were retrospectively analyzed using medical record inquiry system. The data included admission blood glucose, metabolic indexes, hospital stay and hospitalization expenses. The abnormal blood glucose and related factors were analyzed. Results We found that 99.19% (1 712) of the 1 726 inpatients had their blood glucose monitored once at least. According to their past medical history and blood glucose levels on admission or during hospitalization, 42.76% (738) patients had pathoglycemia. Endocrinology department (73.79%,76/103), geriatrics department (54.17%, 13/24) and pancreatic surgical department (50.54%, 93/184) had more pathoglycemia patients than other departments. The patients with newly discovered pathoglycemia (393) accounted for 22.77% of the inpatients, and the hospital stay and hospitalization expenses in these patients were significantly higher than patients with diabetes and impaired glucose regulation (IGR) and those with normal blood glucose (P<0.01). The levels of serum triglyceride (TG) and blood urea (BUN) of diabetic and IGR inpatients were significantly higher than patients with newly discovered high glucose and normal glucose (P<0.01); the levels of high density lipoprotein cholesterol (HDL-C) in diabetic and IGR inpatients and those with newly discovered pathoglycemia were significantly lower than that in those with normal blood glucose (P<0.01), but there was no significant difference between the former two groups. Conclusion Newly discovered hyperglycemia during hospitalization should not be overlooked. The blood glucose monitoring of high risk population should be reinforced on admission and during hospitalization, and a standard management of hyperglycemia should be established.

Effects of kinesio taping on biomechanics characteristics of ankle joint: theoretical research and application advances / 中国组织工程研究

BACKGROUND:Kinesio taping is commonly used,but there is a lack of rigorous and scientific research,especially in biomechanics and exercise.OBJECTIVE:To overview the biomechanics characteristics of the ankle joint after treatment with kinesio taping,and to summarize the biomechanics difference in kinematics,kinetics,and electromyography of the ankle joint between non-kinesio and kinesio taping.METHODS:Ovid Medline,Elsevier SDOL,PubMed and CNKI databases were retrieved for the Chinese and English literatures concerning the biomechanics and exercise performance of kinesio taping published before December 2015.Subsequently,all literatures were classified according to the Oxford Centre for Evidence-based Medicine Levels of Evidence.RESULTS AND CONCLUSION:Most of literatures support the viewpoint that kinesio taping can improve ankle joint stability,increase the arch height and decrease the external load of key muscles of the ankles and feet.Some studies have suggested that during landing,kinesio taping shortened the duration of the peak of support reaction forces,reduced the flexion force,and increased the loading rate of lower extremities,thereby resulting in an increased risk for injury.Other studies have shown that kinesio taping increases the recruitment of motor units and changes the order of neuromuscular contraction,but it cannot improve the athletic performance,and even decrease the athletic performance in most cases.Whether kinesio taping improves muscular force,increases the muscular performance,and increases the power of lower extremities is under discussion;hence,in-depth studies are needed in the future.

Protective effects of glycyrrhizic acid against lupus nephritis in MRL/lpr mice / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate protective effect of glycyrrhizic acid (GA) against lupus nephritis in MRL/lpr mice and explore its underlying mechanisms.</p><p><b>METHODS</b>Forty MRL/lpr mice were randomized equally into blank control group, dexamethasone (1.5 mg/kg) group, GA (20 mg/kg) group, and GA (40 mg/kg) group with corresponding treatments for 7 days, with 10 wild-type mice as the control group. Serum levels of uric acid and creatinine and inflammatory cytokines in the serum and kidney were tested after the treatments using enzyme-linked immunosorbent assays (ELISA). The pathological changes in the kidneys were detected using HE staining, and the protein expressions of NLRP3, ASC, caspase-1, IL-1β, p-NF-κB, NF-κB, p-IκBα, and IκBα were detected with Western blotting.</p><p><b>RESULTS</b>GA obviously decreased serum levels of uric acid and creatinine, decreased inflammatory cytokines in the serum and kidney, ameliorated renal pathologies and inhibited the expressions of NLRP3, ASC, caspase-1, IL-1β, p-NF-κB, and p-IκBα proteins in MRL/lpr mice.</p><p><b>CONCLUSION</b>GA has protective effects against lupus nephritis in MRL/lpr mice.</p>

Effects of diammonium glycyrrhizinate on hepatic and intestinal UDP-Glucuronosyltransferases in rats: Implication in herb-drug interactions / 中国天然药物

Glycyrrhizin is a major bioactive component of liquorice, which exerts multiple biochemical and pharmacological activities and is frequently used in combination with other drugs in the clinic. Mycophenolate mofetil (MMF), an immunosuppressant widely used in transplant patients, is metabolized by UDP-glucuronyltransferases (UGTs). Although significant evidence supports that glycyrrhizin could interact with the cytochrome P450s (CYPs), few studies have addressed its effects on UGTs. The present study aimed at investigating the regulatory effects of diammonium glycyrrhizinate (GLN) on UGTs in vitro and in vivo. We found that long-term administration of GLN in rats induced overall metabolism of MMF, which might be due to the induction of UGT1A protein expression. Hepatic UGT1A activity and UGT1A mRNA and protein expression were significantly increased in GLN-treated rats. UGT1A expression levels were also increased in the intestine, contradicting with the observed decrease in intestinal UGT1A activities. This phenomenon may be attributed to different concentrations of glycyrrhetinic acid (GA) in liver and intestine and the inhibitory effects of GA on UGT1A activity. In conclusion, our study revealed that GLN had multiple effects on the expression and activities of UGT1A isoforms, providing a basis for a better understanding of interactions between GLN and other drugs.

Research progress of targeted drugs in breast cancer treatment / 基础医学与临床

Because of its specificity , significant effect , low side effect , molecular targeted therapy has been applied in the treatment of breast cancer .Recently, various molecular targeted drugs have been exploited including targeted HER family, VEGF, multi-targeted therapeutic drugs , and drugs combination .

Astragaloside IV prevents lipopolysaccharide-induced injury in H9C2 cardiomyocytes / 中国天然药物

This study aimed to investigate the protective effects of astragaloside IV (AS IV) on lipopolysaccharide (LPS)-induced injury in H9C2 cardiomyocytes. H9C2 Cardiomyocytes were cultured with LPS (10 μg·mL(-1)) for 4 h and treated with AS IV at 50, 100, and 150 μmol·L(-1) for various durations. Cell viability was determined by MTT. The content of released TNF-α and IL-6 from cardiomyocytes were evaluated by enzyme-linked immunosorbent assay (ELISA). The levels of superoxidase dismutase (SOD), malondialdehyde (MDA), lactate dehydrogenase (LDH), and creatine phosphate kinase (CK) were measured by using commercial available kits. The mRNA and protein expression levels of NF-κB p65 were measured by RT-PCR and Western blotting, respectively. And the NF-κB p65 activity was measured by ELISA. Our results demonstrated that AS IV at 50, 100, and 150 μmol·L(-1) markedly inhibited the release of TNF-α and IL-6 and decreased NF-κB expression, compared with the model group. Moreover, the improved SOD activity and decreased MDA, LDH and CK levels were detected after AS IV treatment. In summary, AS IV could increase the activities of antioxidant enzymes, inhibite lipid peroxidation, and down-regulate the inflammatory mediators involved in the inflammatory responses. These results demonstrated that AS IV could prevent LPS-induced injury in cardiomyocytes.

Computer navigation-guided excision of rib tumor / 中华胸心血管外科杂志

Objective To evaluate the advantage of using computer navigation system in the resection of rib tumors.Methods We carried out rib tumor resection in 5 patients using computer navigation system.Preoperative CT of each patient was performed.The preoperation CT-based planning was made for every patient with the navigation system software including confirming the tumor surgical margin and designing resection margin.A C-arm scan was carried out intraoperatively.With image fusion of both data,tumor resection were performed under navigation image guidance.Results The mean time of image fusion was 58 minutes.Four tumor resection specimens showed safe and clear margins.Histological examination of all tumor specimens showed tumor-free margins.One patient who was suspected lung cancer with bone metastases was performed a biopsy under navigation image guidance and obtained a pathology diagnose successfully.Conclusion The computer navigation system helps surgeons determine the surgical margin,implement precision tumor resection and reduce surgical damage.