Objective To investigate the value of prophylactic irradiation to the lymphatic drainage area in radical three-dimensional conformal radiotherapy (3DCRT) and to evaluate the efficacy and adverse effects of 3DCRT with different clinical target volumes.Methods A retrospective analysis was performed on the records of 219 esophageal cancer patients without distant metastasis who received 3DCRT from January 2005 to December 2010.One hundred and five patients received involved-field irradiation (IFI) with a total dose of 54-66 Gy;114 patients received elective nodal irradiation (ENI) with a total dose of 46-52 Gy; the prescribed dose to the primary lesion was 56-70 Gy.The Kaplan-Meier method was used to calculate local control (LC) and overall survival (OS) rates,and the log-rank test was used for univariate prognostic analysis.Results The 1-,3-,and 5-year sample sizes were 219,172 and 67,respectively.The 1-,3-,and 5-year LC rates for IFI group were 63.0％,39.1％,and 27.2％,respectively,versus 70.5％,53.3％,and 51.7％ for ENI group (x2 =6.22,P =0.013) ;the 1-,3-,and 5-year OS rates for IFI group were 67.6％,24.9％,and 15.0％,respectively,versus 73.7％,45.1％,and 26.0％ for ENI group (x2=5.04,P =0.025).The univariate stratified analysis showed that the LC and OS rates were significantly higher in the ENI group than in the IFI group for patients with middle-or lower-thoracic primary lesion or N0 disease (P=0.007,0.015;P=0.054,0.013).Conclusions For esophageal cancer patients with middle-or lower-thoracic primary lesion or without lymph node metastasis,prophylactic irradiation to the lymphatic drainage area can increase LC and OS rates.

Objective To analyze the rule of lymph node metastasis, compare the preoperative computed tomographic findings with pathological diagnosis in thoracic esophageal carcinoma and to evaluate the clinical value. Methods Six hundred and eighteen patients with esophageal carcinoma after radical resection were enrolled. All patients did not receive any preoperative radiotherapy or chemotherapy, having complete information of postoperative pathological reports. CT scanning were applied to all patients in our hospital. The CT image were transmitted to the three-dimensional treatment planning system via the network at digital format and be reconstructed. In which system the sensitivity, specificity and accuracy rates in diagnosis of lymph node metastasis of the preoperative CT image were observed, measured and recorded. x2 test or Fisdher's statistical methods was adopted for comparing the concord rate of preoperative CT scanning with postoperative pathological diagnosis. Results Lymph nodes metastasis were defected in 242 of the 618 treated patients(39.2%), The rate of lymph node metastasis present in lower neck, upper-mediastinum,middle-mediastinum, lower-mediastinum, and superior abdomen regions in upper-thoracic esophageal carcinoma were 3.2% ,20.8% ,6.4% ,2.4% and 8.0%, in middle-thoracic esophageal carcinoma 1.5%,7.8% ,22.0% ,3.5% and 22.8%, and in lower-thoracic esophageal carcinoma 0% ,2.0% ,21.4% ,6.1% and 32.7%, respectively. The sensitivity, specificity, positive predictive value, negative predictive value,younden index and accuracy rates of diagnosis of lymph node metastasis with preoperative CT scan were 58.3%, 70.7%, 56.2%, 72.5%, 29.0% and 65.9%, respectively. The concordance rate of 0, 1, 2 and ≥ 3 lymph node metastasis by preoperative CT scanning with postoperative pathological diagnosis were 72.4%, 32.2% , 58.3% and 73.1%, respectively in whole group(x2 = 82. 61, P = 0.000). The concordance rate of no lymph node metastasis by CT scan comparing with that by postoperative pathological diagnosis was higher than that of the 1 lymph node metastasis in upper-thoracic esophageal carcinoma 3 lymph node metastasis were 71.1%, 30.1%, 55.6% and 77.8%, respectively(x2 =55.14,P =0.000.Conclusions Preoperative CT image can accurately predict the distribution patterns of the lymph node metastasis in esophageal carcinoma. The concordance rate was the highest in diagnosis of 0 and ≥3 lymph node metastasis, the lowest in diagnosis of one lymph node metastasis. These findings are valuable for definition of the target range of radiotherapy after radical resection of esophageal carcinoma.

Objective The aim of this study was to evaluate the prognosis of resection followed by chemotherapy compared with chemoradiotherapy for limited-stage small cell lung cancer .Methods The clinical data of 230 limited-stage small cell lung cancer patients with curative treatment between January 2006 and December 2011 were retrospectively analyzed .All patients divided to two group: the resection plus chemotherapy ( S +C ) and chemoradiotherapy ( R +C ) .And the prognostic factors were further analyzed with limited stage small cell lung cancer .The Kaplan-Meier method was used for the survival analysis.Results The overall survival rates of 1-year, 3-year and 5-year were 87.0%, 38.9%, 25.4%, respectively and the media survival time ( MST) 26.0 months.When patients were stratified by clinical stageⅠ+Ⅱ, the 1-year , 3-year and 5-year overall survival rates of S +C group and R +C group were 92.6%, 63.2%, 47.3%and 76.2%, 42.9%, 30.6%, respectively (χ2 =7.851, P<0.05), while those were 88.5%, 26.9%, 10.6% and 86.0%, 25.1%, 25.1%, respectively in stage ⅢA with no significant difference ( P >0.05).In univariate analysis, tumor location, tumor stage, lymph node metastasis, TNM stage, the cycle of chemotherapy , treatment modalities were significantly associated with survival ( RR=1.735, P<0.05).The multivariate analysis only showed TNM stage were independent factors of prognosis .Conclusions The results suggested that resection plus chemotherapy could improve the prognosis of early-stage(stageⅠ+Ⅱ) small cell lung cancer, but patients in ⅢA stage should received the definitive chemoradiotherapy .The TNM stage was still the independent factor of prognosis .

Objective To compare dose-volume parameters for local failure in esophageal cancers treated by there-dimensional conformal radiotherapy (3 D-CRT) or intensity modulated radiotherapy (IMRT) with different target regions.Methods A total of 244 patients with esophageal cancer (including 127 patients with local recurrence and 117 without recurrence) underwent radical 3D-CRT and IMRT were enrolled in this study.Data including dose-volume parameters and clinical features were analyzed retrospectively.Results No statistically significant differences were found in the dose-volume parameters of different planning target regions between groups with local tumor recurrence and without recurrence (P ＞ 0.05).In the elective nodal irradiation(ENI) group, neither the recurrence and the non-recurrence groups showed statistical differences in the dose-volume parameters (P ＞ 0.05).While for the involved-field iradiation(IFI) group, the GTV-V60, CTV-V60, PTV-V60 of local recurrent group were significantly lower than those in the non-recurrent group (t =-2.08,-2.19,-2.08, P ＜ 0.05).In the ENI group, radiated doses of GTV, CTV and PTV as well as dose-volume of PTV were significantly higher than the IFI group (t =1.97-3.12, P ＜ 0.05).For patients with a esophageal GTV less than 30 cm3 but without concurrent chemotherapy, radiated dose of CTV-D98％ , CTV-D95％ in the recurrent group were significantly lower than in non-recurrent group (t =-2.24--2.07, P ＜ 0.05).Conclusions Elective nodal prophylactic radiation of esophageal carcinoma could provide greater volume and doses of GTV, CTV and PTV to prescribed target regions, which may decrease local recurrence.Greater efficiency can be obtained when the primary lesion of the esophageal cancer is smaller or at an early stage, and concurrent chemotherapy is not given.

Objective To compare the efficacy of elective nodal prophylactic irradiation ( ENI) and involved?field irradiation ( IFI) in radical radiotherapy for early?stage esophageal cancer and to determine the appropriate irradiation range for early?stage esophageal cancer. Methods The clinical data of 121 patients with early?stage esophageal cancer receiving radical radiotherapy in our hospital from January 2006 to December 2011 were collected and respectively analyzed. Sixty?one patients received ENI, and the other 60 patients received IFI. The Kaplan?Meier method was used to calculate local control ( LC) and overall survival ( OS) rates;the log?rank test was used for survival difference analysis and univariate prognostic analysis;the Cox regression model was used for multivariate prognostic analysis. Results The 1?, 3?, and 5?year LC rates in ENI group and IFI group were 81. 1%, 60. 1%, and 57. 5% vs. 64. 5%, 43. 9%, and 27. 2%, respectively ( P=0. 003 ) . The 1?, 3?, and 5?year OS rates in ENI group and IFI group were 86. 9%, 56. 8%, and 34. 8% vs. 86. 7%, 34. 3%, and 19. 1%, respectively ( P=0. 019) . The 1?, 3?,and 5?year overall failure rates in ENI group and IFI group were 22. 3%, 53. 8%, and 63. 2% vs. 43. 3%, 65. 8%, and 78. 8%, respectively ( P=0. 023) . Multivariate analysis showed that irradiation range was the influencing factor for LC and OS. Conclusions As for the radical radiotherapy for early?stage esophageal cancer, ENI can significantly increase LC and reduce locoregional failure, and therefore improve long?term OS.

The distal radioulnar joint (DRUJ) is one of the most important joints connecting hand and forearm,playing an important role in maintaining normal rotation of the hand and forearm and stability of the wrist.Serious DRUJ dislocation can lead to functional limitation of the forearm and wrist.DRUJ displacement is not uncommon clinically,but often missed.It is usually associated with a distal radioulnar fracture,with an incidence ranging from 10％ to 19％.Without correct and effective diagnosis and treatment,it will lead to chronic pain,dysfunction and other complications.There are various treatments for DRUJ displacement,like initiative splint fixation,percutaneous fixation with kirschner wire,soft tissue reconstruction,joint fusion and joint replacement at the end-stage,and arthroscopic techniques as well which are increasingly popular in recent years.All these treatments ease the patients' pain to a certain extent,but also bring about complications of different severities.Currently,reconstruction of the DRUJ stability using elastic suspension system may be a new treatment alternative in the future because it has gradually attracted the attention from experts.

Objective To investigate the consensus and controversies on the delineation of radiotherapy target volume for patients with locally advanced non-small cell lung cancer (LA-NSCLC).Methods Questionnaires including 15 questions on the delineation of radiotherapy target volume of NSCLC were sent to 12 radiation departments in China in November 2015.A patient with LA-NSCLC was selected by Fudan University Shanghai Cancer Center, and simulation CT images and medical history data were sent to the 12 radiation departments.Twelve radiation oncologists from the 12 radiation departments showed and explained the delineation of radiotherapy target volume of their own, and the patient was discussed by all experts in the sixth multidisciplinary summit forum of precise radiotherapy and chemotherapy for tumor and lung cancer.Results All receivers of the questionnaire answered the questions.The standard lung window width/level for the delineation of lung cancer was 800-1600/-600 to-750 HU, and the mediastinum window was 350-400/20-40 HU.Respiratory movement was measured by stimulator, 4D-CT, and stimulator+4D-CT with 2-5 mm expansion based on experience.The primary clinical target volume (CTV) was defined as gross target volume (GTV) plus 5-6 mm for squamous carcinoma/5-8 mm for adenocarcinoma.The metastatic lesion of mediastinal lymph nodes was delineated as 5 mm plus primary lesion in 6 departments and as primary lesion in another 6 departments.Of the 12 departments, 10 applied 5 mm of set-up error, 1 applied 3 mm, and 1 applied 4-6 mm.For V20 of the lungs, 10 departments defined it as<30%, 1 as<35%, and 1 as 28%.Nine departments defined the radiation dose of concurrent chemoradiotherapy (CCRT) for LA-NSCLC as 60 Gy in 30 fractions, 62.7 Gy in 33 fractions in 1 department, 50-60 Gy in 25-30 fractions in 1 department, and 60-70 Gy in 25-30 fractions in 1 department.For the delineation of target volume for the LA-NSCLC patient treated with CCRT, the primary planning target volume (PTV) was defined as GTV plus organ movement (IGTV) and set-up error (GTV→IGTV→PTV) in 3 departments, as CTV plus organ movement (ITV) and set-up error (GTV→CTV→ITV→PTV) in 8 departments, and as CTV plus set-up error/IGTV plus 5-6 mm for squamous carcinoma/5-8 mm for adenocarcinoma (CTV) and set-up error (GTV→CTV→PTV/GTV→IGTV→CTV→PTV) in 1 department.For the delineation of PTV in the mediastinal lymph node, GTV→IGTV→PTV was performed in 3 departments, GTV→CTV→ITV→PTV in 8 departments, and GTV→CTV→PTV in 1 department.For 10%-100% patients with LA-NSCLC, the radiation field needed to be replanned when 38-50 Gy was completed.There was no unified standard for the optimal standardized uptake value (SUV) of positron emission tomography (PET)-computed tomography (CT) simulation and delineation.Seven departments had applied magnetic resonance imaging (MRI) simulation and 10 departments had applied stereotactic body radiation therapy (SBRT) for the treatment of early-stage NSCLC.For the delineation of PTV for early-stage NSCLC (T1-2N0M0), GTV→IGTV→PTV was performed in 5 departments, IGTV→PTV in 3 departments, and GTV→CTV→ITV→PTV in 2 departments.In all the 12 departments, peripheral early-stage NSCLC was given 6.0-12.5 Gy/fraction, 3-12 fractions and central early-stage NSCLC was given 4.6-10.0 Gy/fraction, 5-10 fractions.The results of discussion on the delineation of target volume for the patient were as follows:respiratory movements should be measured by 4D-CT or simulator;the lung window width/level is 1600/-600 HU and the mediastinal window width/level is 400/20 HU;the primary controversy is whether the involved-field irradiation or elective nodal irradiation should be used for the delineation of CTVnd in the mediastinal lymph node.Conclusions Basic consensus is reached for the delineation of target volume in LANSCLC in these aspects:lung window width/level, respiratory movements and set-up error, primary lesion delineation, the radiation dose in CCRT, and the optimal time for replanning the radiation field.There are controversies on the optimal SUV in the delineation of target volume based on PET-CT simulation, the optimal dose fractionation in SBRT for early-stage NSCLC, and the delineation of CTVnd.

Objective To compare the prognosis of patients with squamous cell carcinona of the upper thoracic esophagus after radical resection with and without postoperative chemoradiotherapy (POCRT).Methods From January 2007 to December 2011,168 patients with upper thoracic esophageal carcinoma who were treated in the Fourth Hospital of Hebei Medical University were retrospectively included in this study.According to the different treatment method,they were divided into simple surgery group (86 cases) and POCRT group (82 cases) respectively.Based on SPSS statistical software,the group data composition,prognostic analysis and multivariate prognostic analysis were performed by x2 test,Log-rank method and Cox regression model,respectively.Results The 1,3,5 year-survival rate,recurrence rate and distant metastasis rate were 83.9％,52.4％,43.5％,26.5％,40.8％,43.4％ and 5.3％,11.4％,16.9％,respectively.The result of multivariate analysis showed that gender,T stage,N stage and treatment method were independent prognostic factors of overall survival (P =0.020,0.008,0.005,0.000);N staging and treatment method were the independent prognostic factors of local/regional recurrence (P =0.001,0.003);differentiation and T staging were the independent prognostic factors of distant metastasis (P =0.045,0.020).The intrathoracic regional recurrence rate of operation only group and POCRT group patients were 44.2％ (38/86) and 29.3％ (24/82) respectively,where the difference was statistically significant (x2 =7.110,P ＜ 0.05).The rate of metastasis were 19.8％ (17/86) and 13.4％ (11/82) respectively without significant difference (P ＞0.05).Conclusions The recurrence rate of patients with upper thoracic esophageal squamous cell carcinoma after radical resection was still high.Postoperative chemoradiotherapy can improve the overall survival rate and reduce the recurrence rate,but whether it can reduce the patient's distant metastasis rate needs further study.

Objective:To analyze the clinical prognosis of patients with cervical and upper thoracic esophageal squamous cell carcinoma treated with radical intensity-modulated radiotherapy (IMRT) with or without chemotherapy, and to explore the significance of elective lymph node irradiation (ENI).Methods:A retrospective analysis was performed on 309 patients with cervical and upper thoracic esophageal squamous cell carcinoma who underwent IMRT with or without chemotherapy in the Department of Radiology, the Fourth Hospital of Hebei Medical University. The prognostic factors were analyzed and patients receiving different irradiation methods were assigned into different group. The curative effect, toxicity and side effects were analyzed among different groups.Results:The 1-, 3-and 5-year overall survival (OS) and progression-free survival (PFS) were 76.7%, 37.4%, 19.3% and 59.7%, 27.4% and 14.4%, respectively, with median values of 26.8 and 15.5 months. Multivariate analysis showed that gender, cTNM staging and chemotherapy were the prognostic factors affecting the OS ( P=0.003, P<0.001, P=0.022), and gender, cTNM stage and radiation mode were the prognostic factors affecting the PFS ( P=0.016, P<0.001, P=0.008). After propensity score matching (PSM), the 1-, 3-, and 5-year OS and PFS were 77.2%, 39.3%, 20.0%, and 62.0%, 29.3%, and 15.4%, respectively, with median values of 27.1 and 18.2 months. Multivariate analysis showed that gender, cTNM staging and chemotherapy were the prognostic factors affecting the OS ( P=0.026, P<0.001, P=0.017); cTNM staging and irradiation mode were the prognostic factors affecting the PFS ( P<0.001, P=0.008). A subgroup analysis of chemotherapy showed that patients receiving 3-4 cycles of chemotherapy were preferred. The side effects of the patients were mainly grade 0 to 2, which could be tolerated. Conclusions:IMRT combined with or without chemotherapy is an efficacious treatment for patients with cervical and upper thoracic esophageal squamous cell carcinoma; ENI can improve the PFS of patients.

Objective:To observe the postoperative complications and revision rates of robot arm-assisted unicompartment arthroplasty by means of a meta-analysis.Methods:Relevant databases including Cochrane Library, PubMed, EMBASE, Wanfang, VIP, CNKI, and Web of Science were searched by computer for high-quality studies on complications and revision rates after robot arm-assisted unicompartment arthroplasty in both English and Chinese from the database establishment date to March 2021. The quality of the studies retrieved was evaluated. Relevant data including postoperative complications, infection, pain, prosthesis loosening, and revision were extracted for a meta-analysis using STATA 15.0 software.Results:A total of 16 studies were included, including one randomized controlled study, 6 case-control studies and 9 cohort studies. By the methodological index for non-randomized studies (MINORS), 7 studies scored 14 points, 3 studies 13 points, one study 12 points, 4 studies 11 points, and one study 10 points. Meta analysis showed that the total rate of complications was 2% (95% CI: 1%to 4%) . Three studies used NAVIO robot, 7 studies MAKO robot, one study NAVIO and MAKO robots, and one study Acrobot robot. Since just one study used Acrobot robot, only MAKO and NAVIO robots were included for the subgroup analysis which showed that the postoperative complication rates for NAVIO and MAKO robots were 4.0% (95% CI: -2% to 10%) and 3% (95% CI: 1% to 5%) , respectively. The incidence of postoperative pain was 0.2% (95% CI: 0.1% to 0.3%), the incidence of postoperative infection 0.5% (95% CI: 0.3% to 0.8%), the incidence of postoperative prosthesis loosening 0.5% (95% CI: 0.3% to 0.8%), and the revision rate 2% (95% CI: 1% to 2%). According to the subgroup analysis of NAVIO and MAKO robots, their revision rates were 4% (95% CI: 2% to 7%) and 2% (95% CI: 1% to 2%), respectively. Conclusion:The clinical efficacy of robot arm-assisted unicompartment arthroplasty is good, for the complications in the patients are limited and the long-term survival rate of the prosthesis is excellent.