Objective:To explore the predictive value of a regression model based on diffusion kurtosis imaging (DKI) parameters for prediction of the recurrence risk in patients with estrogen receptor (ER)-positive, human epidermal growth factor receptor 2 (HER-2)-negative early invasive breast cancer.Methods:A retrospective cross-sectional study was designed. The clinicopathological (age, histological grade, Ki-67 level, etc.) and imaging data of 50 patients (50 lesions) with ER-positive, HER-2 negative early invasive breast cancer who underwent treatment at Wuxi People′s Hospital from January 2016 to December 2018 were retrospectively analyzed. All patients were female, aged 29 to 81 years, and underwent pre-operation conventional MRI and DKI examinations. The volume of breast fibroglandular tissue (FGT), background parenchymal enhancement (BPE), and internal enhancement features were recorded; the peak enhancement (PH), peak enhancement rate, time to peak, mean kurtosis (MK), and mean diffusivity (MD) were calculated. Based on the 21-gene recurrence risk scores, patients were divided into low recurrence risk group and medium-high recurrence risk group. Independent sample t test, Mann-Whitney U test, χ2 test were used to compare the differences of various indicators between the two groups. Two logistic models were constructed with age, PH, MD, and MK as independent variables (Pre1), and with Ki-67, age, PH, MD, and MK as independent variables (Pre2), respectively. The efficacy of the models in predicting low recurrence risk in patients was assessed using receiver operating characteristic curve and area under the curve (AUC). Results:There were 25 cases in the low recurrence risk group and 25 cases in the medium-high recurrence risk group. The differences in age, FGT, PH, MD, MK, and Ki-67 between the low recurrence risk group and the medium-high recurrence risk group were statistically significant (all P<0.05), while other indexes showed no statistically significant differences (all P>0.05). The AUC of Pre1 in predicting low recurrence risk of ER-positive, HER-2 negative early invasive breast cancer was 0.87, with a sensitivity of 0.76 and specificity of 0.88. The AUC of Pre2 for predicting the low recurrence risk of ER-positive, HER-2 negative early invasive breast cancer was 0.92, with a sensitivity of 0.84, and specificity of 0.92. Conclusions:A multi-parameter model based on DKI can effectively predict the recurrence risk of ER-positive and HER-2 negative breast cancer. The model with combination of Ki-67 can further improve the predictive efficacy, and help effectively identify patients at low recurrence risk.

Objective To explore the effectiveness of high-definition diffusion weighted imaging(DWI)sequence combined with T1 WI-fat suppression(FS)dynamic contrast enhancement(DCE)sequence for preoperative T-stage of rectal cancer by using 3.0T MRI standardized scanning.Methods A retrospective analysis was conducted on MRI images of 57 patients with rectal cancer confirmed by pathology.Before surgery,the patients underwent 3.0T MRI standardized rectal cancer scan methods,including routine sequence,high-definition DWI sequence,and T1 WI-FS DCE sequence,etc.Then two experienced physicians evaluated the T-stage of preoperative rectal cancer through high-definition DWI(transverse and sagittal sections)and T1 WI-FS DCE sequences in the double-blind method.Using the postoperative pathological results of rectal cancer as the"gold standard",two sequences were combined to evaluate the accuracy,sensitivity,and specificity of rectal cancer T-stage.Results Among the 57 cases,there were 9 cases of upper rectal cancer,39 cases of middle rectal cancer,and 9 cases of lower rectal cancer.The accuracy rates of preoperative T-stage diagnosis for rectal cancer by two evaluator were both 85.7％(6/7)in T1 stage,88.2％(15/17)and 94.1％(16/17)in T2 stage,96.9％(31/32)and 93.8％(30/32)in T3 stage,and both 100.0％(1/1)in T4 stage.For evaluator 1,the sensitivity and specificity of the rectal cancer T-stage diagnosis were 96.1％and 83.3％,and for evaluator 2 were 94.1％and 83.3％,respectively.For rectal cancer MRI diagnosis,the accuracy rates and sensitivity were higher when combining the high-definition DWI sequence and T1 WI-FS DCE sequence,compared with a single high-definition DWI sequence or T1 WI-FS DCE sequence,and the difference was statistically significant.The average preoperative apparent diffusion coefficient(ADC)value of rectal cancer was compared between the corresponding postoperative pathological T1 to T4 stage groups,and the difference was statistically significant.Conclusion The combination of high-definition DWI sequence and T1 WI-FS DCE sequence improves the accuracy of rectal cancer T-stage,providing assistance for personalized clinical treatment.

Objective:To evaluate the effect of the positive P-glycoprotein expression on the efficacy of patient-controlled intravenous analgesia (PCIA) with sufentanil or pentazocine in patients with cancer pain.Methods:This was a retrospective cohort study. The medical records of patients with cancer pain of either sex, aged 54-71 yr, weighing 49-67 kg, with TNM stage Ⅱ-Ⅳ, who were treated in People′s Hospital of Lishui from January 2020 to January 2024, were collected. The expression of P-glycoprotein in tumor tissues was determined by the immunohistochemical method. Patients with negative P-glycoprotein expression in tumor tissues were divided into 2 groups: sufentanil group (group S 1) and pentazocine group (group P 1). Patients with positive P-glycoprotein expression in tumor tissues were divided into 2 groups: sufentanil group (group S 2) and pentazocine group (group P 2). The patients in 4 groups received 48 h of PCIA when visual analogue scale > 5 cm. The PCIA solution contained sufentanil 2 μg/kg and tropisetron 10 mg in 100 ml of normal saline in S 1 and S 2 groups or pentazocine 3 mg/kg+ tropisetron 10 mg in 100 ml of normal saline in P 1 and P 2 groups. The PCIA pump was set up to deliver a 1 ml bolus dose with a 10-min lockout interval and background infusion at 2 ml/h after a loading dose of 5 ml. Flurbiprofen 50 mg was intravenously injected when visual analogue scale > 3 cm during analgesia. The consumption of sufentanil, pentazocine and flurbiprofen within 4 h, >4-12 h, > 12-24 h and > 24-48 h of PCIA was recorded. The occurrence of adverse reactions such as respiratory depression (SpO 2<90%), nausea or/and vomiting, pruritus and bradycardia was recorded. Results:One hundred patients were finally included, with 25 in each group. There was no significant difference in the consumption of sufentanil, usage rate of flurbiprofen and incidence of respiratory depression, nausea and vomiting, pruritus and bradycardia during analgesia at each time period during PCIA between group S 1 and group S 2 ( P>0.05). Compared with group P 1, the consumption of pentazocinein was significantly increased within 4 h, > 4-12 h, and > 24-48 h of PCIA ( P<0.05), and no significant change was found in the usage rate of flurbiprofen at each time period and the incidence of respiratory depression, nausea or/and vomiting, pruritus and bradycardia during analgesia in group P 2 ( P>0.05). Conclusions:Positive P-glycoprotein expression may weaken the efficacy of PCIA with pentazocine, but exerts no effect on the efficacy of PCIA with sufentanil in patients with cancer pain.

Objective:To investigate the prognostic factors for all-cause mortality in patients with muscle-invasive bladder cancer(MIBC)with intermediate-to-high-risk primary prostate cancer.Methods:From January 2012 to October 2023,the clinical data of the patients with MIBC with intermediate-to-high-risk primary prostate cancer in Peking University Third Hospital were retrospectively analyzed.All the patients were monitored and the occurrence of all-cause death was documented as the outcome event in the prognostic study.Univariate and multivariate Cox proportional risk regression analysis models were implemented to search for independent influences on the prognosis of patients.For significant influencing factors(pathological T stage,M stage and perineural invasion of bladder cancer),survival curves were plotted before and after multifactorial Cox regression adjusting for confounding factors.Results:A total of 32 patients were included in this study.The mean age was(72.5±6.6)years;the median preoperative total prostate specific antigen(tPSA)was 6.68(2.47,6.84)μg/L;the mean preoperative creatinine was(95±36)μmol/L,and the median survival time was 65 months.The majority of the patients(87.5％)had high-grade bladder cancer,53.1％had lymphatic invasion,and 31.3％had perineural invasion.Prostate involvement was observed in 25.0％of the cases,and the positive rate of soft-tissue surgical margin was 37.5％.Multivariate Cox analysis revealed that preoperative creatinine level(HR=1.02,95％CI:1.01-1.04),pathological stage of bladder cancer T3(HR=11.58,95％CI:1.38-97.36)and T4(HR=19.53,95％CI:4.26-89.52)metastasis of bladder cancer(HR=9.44,95％CI:1.26-70.49)and perineural invasion of bladder cancer(HR=6.26,95％CI:1.39-28.27)were independent prognostic factors(P＜0.05).Survival curves with Log-rank test after adjusting for confounding factors demonstrated that bladder cancer pathology T3,T4,M1,and perineural invasion were unfavorable factors affecting the patients'survival prognosis(P＜0.05).Conclusion:Patients with MIBC with intermediate-to-high risk primary prostate cancer generally portends a poor prognosis.High preoperative serum creatinine,T3 or T4 pathological stage of bladder cancer,metastasis of bladder cancer and bladder cancer perineural invasion are poor prognostic factors for patients with MIBC with intermediate-to-high risk primary prostate cancer.

Objective:To analyze the clinical effects of intraoperative transesophageal echocardio-graphy(TEE)in different surgical methods for nephrectomy combined with Mayo Ⅲ-Ⅳ inferior vena cave(IVC)tumor thrombectomy.Methods:In the study,28 patients who did surgery of nephrectomy and Mayo Ⅲ-Ⅳ IVC thrombectomys in Peking University Third Hospital from 2022 January to 2024 February were included.Of the 28 patients,16 patients did robotic surgery,2 patients did laparoscopic surgery,and 10 patients did open surgery.All patients'clinical data were collected.Results:Intra-operative TEE was used in 9 robotic surgeries,of which 7 cases showed image changes compared with preoperative image results.Intraoperative TEE indicated that tumor thrombus entered the right atrium in 2 cases,showed that tumor thrombus grade rose from Mayo Ⅲ to Mayo Ⅳ in 2 cases,and indicated that tumor thrombus adhered to IC wall in 3 cases.All of these surgical plans were timely adjusted.Intra-operative TEE was used in 6 cases of open surgery,and 4 cases of them showed Mayo grade changes com-pared with preoperative image results.Intraoperative TEE indicated that tumor thrombus adhered to the IVC wall in 3 cases,and tumor thrombus adhered to the IVC wall with thrombus in one case.The surgi-cal plans were adjusted,and the tumor thrombus was left or segmentally removed.Laparoscopic surgery did not use intraoperative TEE.The effects of intraoperative TEE included:the combination of explora-tion and TEE monitoring was used in open surgery,and tumor thrombus removal process was fully moni-tored by intraoperative TEE in the robotic surgery.Intraoperative TEE real-time monitored circulatory sta-tus and cardiac function changes.Conclusion:In different surgical methods for nephrectomy com-bined with Mayo Ⅲ-Ⅳ tumor thrombectomy,intraoperative TEE can re-determine the tumor thrombus grade and degree of tumor thrombus adhered to IVC,track the tumor thrombus removal process in real-time,and monitor circulatory status and cardiac function changes.Intraoperative TEE plays an important role in different surgical methods,but its clinical application is still insufficient.Intraoperative TEE is recommended to such type of surgeries.

Objective:To investigate the relationship between RAS, BRAF gene mutations and HER2 gene amplification and clinicopathology and prognosis of colorectal cancer.Methods:The clinical data of 268 patients with colorectal cancer were retrospectively analyzed. KRAS, NRAS and BRAF gene mutations and the HER2 gene amplication were detected.Results:The mutation rates of KRAS, NRAS and BRAF were 53.4% , 2.6% and 3.0%, respectively. The amplification rate of HER2 was 6.7%. KRAS gene mutation tended to occur in the right side colon and rectal cancers( χ2=10.824, P=0.004). BRAF gene mutation mainly occurred in the right side colon cancer ( P=0.044). HER2 gene amplification tended to occur in colorectal cancer patients with RAS/BRAF wild-type ( OR=0.322,95% CI:0.117-0.887, P=0.027). Univariate analysis showed that the progress-free survival of colorectal cancer patients with RAS mutation was significantly shorter than that of the patients with wild( χ2=6.153, P=0.013), and there was no significant difference in overall survival time( χ2=1.938, P=0.164).The progress-free survival and overall survival time were shorter in BRAF mutation than in the wild type( χ2=8.090, P=0.004; χ2=11.125, P=0.001). Multivariate analysis showed that BRAF gene mutation was independent risk factor for survival of colorectal cancer patients ( HR=3.536,95% CI:1.305-9.583, P=0.013). Conclusion:BRAF gene mutations was independent risk factor for poor prognosis of colorectal cancer patients.

Objective:To explore the screening scheme of gastric cancer in large-scale natural population in Wuxi.Methods:From December 2016 to December 2019, 105 865 residents of 19 communities (villages) in six streets of Xinwu District, Wuxi were randomly enrolled in this study by random number table. A household epidemiological questionnaire survey was conducted among 50 063 target population subjects (aged 40-69), and then, respondents were divided into four categories, category Ⅰ: HP (-), PG (-); category Ⅱ: HP (+ ), PG (-); category Ⅲ: HP (+ ), PG (+ ); category Ⅳ: HP (-), PG (+ )according to the serological Helicobacter pylori ( HP) antibodies and pepsinogen (PG) test results. People in category Ⅲ and Ⅳ were all selected into group C and group D respectively, then individuals 3 times of group D were randomly selected from category Ⅰ to assign to group A, and individuals 3 times of group C from category Ⅱwere assigned to group B in the same way. Remaining individuals in category Ⅰ and Ⅱ who had first-degree family history of gastric cancer were also included in group A and group B, respectively. Endoscopic and pathological examination were performed on the above enrolled subjects for high grade intraepithelialneoplasia (HGIN), early gastric cancer and gastric cancer. Results:Of the 50 063 target subjects, 31 508 questionnaires were finally collected, with a participation rate of 62.9%. A total of 19 745 people were tested for serology, and the participation rate was 39.4% (19 745/50 063). Serological results showed that there were 11 152 people (56.48%) in category Ⅰ, 8 170 (41.38%) in category Ⅱ, 124 (0.63%) in category Ⅲ, and 299 (1.51%) in category Ⅳ. According to the exclusion criteria and principle of voluntariness, 3 400 individuals were candidates to undergo gastroscopy. Finally, a total of 2 389 people came to the hospital for gastroscopy, 1 263 in group A, 814 in group B, 86 in group C and 226 in group D, with an overall response rate of 70.3% (2 389/3 400), target population participation rate of 4.8% (389/50 063), and the overall population participation rate of 2.3% (2 389/105 865). In the 2 389 cases, there were 32 cases (1.34%) of HGIN and gastric cancer by gastroscopy and biopsy pathology, among which 1 case (3.125%) aged 40-49, 9 (28.125%) aged 50-59, and 22 (68.750%) aged 60-69. Among the 32 cases, 25 cases (78.13%)were pathologically confirmed as having HGIN or early gastric cancer by endoscopic submucosal dissection or surgical operation. By eliminating 810 people (including 3 gastric cancer) without first-degree family history with gastric cancer in group Ⅰ and Ⅱ, and increasing the gastroscopy screening age to 50 years (exluding 214 people aged 40-49, including 1 gastric cancer), the number of people who should undergo gastroscopy could be reduced from 2 389 to 1 365, and 28 cases of HGIN or gastric cancer were still detected, including 22 HGIN or early gastric cancer.Conclusion:Gastroscopy after the screening with epidemiological, serological tests, age and first-degree relative with gastric cancer family history is suitable for gastric cancer screening in Wuxi. Based on Chinese national conditions, a new community gastric cancer screening program is recommended in Wuxi considering cost-effectiveness, which includes those over 50 years old, serological PG (+ ) and first-degree relatives with family history of gastric cancer.

Objective:To investigate the clinicpathological characteristics of post-transplant lymphoproliferative disorders (PTLD) in transplanted lung, and to improve its diagnosis and treatment.Methods:The clinicopathological characteristics of PTLD in three transplanted lungs were evaluated at Wuxi People′s Hospital Affiliated to Nanjing Medical University from 2014 to 2019. HE, immunohistochemical staining and in situ hybridization were performed. The relevant literature of PTLD was reviewed.Results:All three patients had chronic obstructive pulmonary disease (COPD) before lung transplantation. After receiving both lung transplants, they were all treated with anti-rejection drugs tacrolimus or mycophenolate mofetil, and combined with antiviral and/or rituximab. The time from transplantation to diagnosis of PTLD was four years, seven months, and five months, respectively. Two patients died one month and five months after initial diagnosis, and one patient was alive with no disease after one year. Histologically, all cases were monomorphic B-cell PTLD (diffuse large B-cell lymphoma, unspecified), and the tumor cells were positive for Epstein-Barr virus by in situ hybridization; one of the late-onset patients had herpes simplex virus infection.Conclusions:PTLD in the post-transplant lung tissue shows unique morphology and clinical characteristics, and is closely related to Epstein-Barr virus infection. Patients who receive lung transplantation due to COPD are more susceptible to develop PTLD, while late-onset ones occur more commonly in the hilum of lungs, and the prognosis is relatively poor.

Objective:To investigate the application of case-based learning (CBL) combined with evidence-based learning (EBL) teaching in clinical teaching of oncology.Methods:Totally 57 resident doctors were divided into experimental group and control group. The experimental group received CBL and EBL teaching, and the control one received lecture-based learning (LBL) teaching. The teaching effect was evaluated by examination and questionnaire, and the data were analyzed by SPSS 20.0.Results:The examination scores of the experimental group and the control group were (85.393±7.213) and (81.276±8.035), and the ones of case analysis were (34.393±2.485) and (32.379±3.005) respectively. Meanwhile, questionnaire survey showed that the evaluations of experimental group were significantly better than those of the control one in promoting learning interest and initiative, retrieval ability, self-learning ability, clinical thinking and learning efficiency ( P<0.05). Conclusion:The teaching effect of integration of CBL and EBL is better than LBL.

Objective:To identify the relationship between positive surgical margin after laparoscopic radical prostatectomy and intravesical prostatic protrusion length on preoperative magnetic resonance imaging.Methods:We retrospectively analyzed 110 patients with pathologic confirmed prostate carcinoma who underwent laparoscopic radical prostatectomy in our hospital. For all 110 patients, the average age was (70.4±7.8) years old, median pre-biopsy PSA was 12.23 ng/ml(range 0.78-110 ng/ml). There were 27 cases, 35 cases and 48 cases for biopsy Gleason score 6, 7 and ≥8. There were 73 patients with clinical stage T 1 and T 2, 37 patients with clinical stage T 3.The median prostatic volume was 38.16ml(range 11.83-163.36ml). MRI examination was performed in 1 week before the biopsy. Intravesical prostatic protrusion length (IPPL) was measured on MRI as the vertical distance from the tip of the protruding prostate to the base of the urinary bladder. All patients who underwent MRI preoperatively median IPPL was 3 mm(range 0-27 mm). There were 72 patients with IPPL<5 mm and 38 patients with IPPL≥5 mm respectively. All patients received extra-peritoneal laparoscopic radical prostatectomy. Parameters describing the surgical margin status and the location of positive surgical margin was recorded. The χ 2 tested the statistical significance in proportions differences. The multivariable logistic regression was used to assess risk factors for positive surgical margin and positive base surgical margin(PBSM). Results:Positive surgical margin rate was 38.1% for all patients, 25 patients(22.7%) had PBSM.χ 2 test showed that clinical stage ( P<0.001) and IPPL ( P=0.038) were related to the postoperative positive surgical margin. The clinical stage, Gleason score and IPPL were included in the multivariate logistic regression analysis. Multiple logistic regression showed that T 3 stage( P<0.001) was independent predictor for positive surgical margin. χ 2 test showed that clinical stage( P<0.001) and IPPL( P=0.001) were related to the postoperative PBSM. The clinical stage, Gleason score and IPPL were included in the multivariate logistic regression analysis. T 3 stage( P<0.001)and IPPL≥5 mm ( P=0.009) were independent predictors for PBSM according to multivariable logistic regression. Conclusions:For prostate cancer patients who received laparoscopic radical prostatectomy, clinical stage T 3was an independent risk factor for postoperative positive surgical margin. IPPL≥5 mm on preoperative magnetic resonance imaging and clinical stage T 3 were independent risk factors for PBSM.