Objective To analyze the multimodal imaging findings of nonspecific granulomatous prostatitis (NSGP)and improve our understanding of the disease.Methods 1 427 patients underwent transrectal ultrasoundGguided prostate biopsies in our department,then 1 3 nodules in 11 patients were proven NSGP by pathology,of which 3 nodules were in inner gland and 10 were in outer gland.The characteristics of these nodules on MRI,transrectal ultrasound elastography (TRE)and contrastGenhanced ultrasonography (CEUS)were retrospectively analyzed. Results MRI:All of the nodules showed similar performances:hypointensity on T1 WI and T2 WI,low ADC and high signal on DWI (highGbGvalue),early enhancement and faded fast or slow,depressed citrate (Cit)and relatively elevated choline (Cho)peak.TRE:The cutGoff point of strain ratio (SR)was determined as 5.97 to diagnose prostate cancer and the SRs of 8 nodules were greater than 5.9 7.CEUS:1 1 nodules showed early enhancement and great intensity,but the rest of nodules showed same performance with normal tissue.Conclusion The multimodal imaging helps to improve the understanding of NSGP and plays a positive role in guiding targeted biopsy.Moreover,the operators could lessen the number of needle punctures properly according to the multimodal imaging findings, which would reduce the risk of puncture complications on patients.

Objective:To analyze the predictive factors of autogenous arteriovenous fistula (AVF) maturation and tentatively discuss the intervention timing of assisted maturation.Methods:It was a retrospective study. The data of patients with newly established AVF and regular follow-up in Haidian Hospital, the Third Hospital of Peking University from August 1, 2018 to March 31, 2022 were analyzed. The patients were divided into mature group and immature group based on whether they met clinical maturity or ultrasonic maturity criteria 3 months after AVF establishment.The general data, preoperative laboratory examination and postoperative ultrasonic examination parameters were compared between the two groups. Logistic regression analysis model was used to analyze the related factors of AVF maturation, and receiver operating characteristic curve (ROC curve) was drawn to evaluate the predictive value of each factor for AVF maturation and intervention timing.Results:A total of 568 patients were included, with age of (56.86±13.82) years old, 339 males (59.68%), and 229 females (40.32%). There were 380 patients in the maturation group and 188 patients in the immature group. The total rate of AVF maturation was 66.90% (380/568). The anastomosis diameter ( t=9.732, P < 0.001), ln(anastomosis artery diameter)( t=10.116, P < 0.001), anastomosis vein diameter ( t=13.961, P < 0.001), ln(brachial artery diameter)( t=9.362, P < 0.001) and brachial artery blood flow ( t=16.542, P < 0.001) of postoperation one month, and anastomosis diameter ( t=7.356, P < 0.001), anastomosis artery diameter ( t=11.117, P < 0.001), anastomosis vein diameter ( t=12.332, P < 0.001), ln(brachial artery diameter) ( t=7.956, P < 0.001) and brachial artery blood flow ( t=13.803, P < 0.001) of postoperation three months in the mature group were significantly higher than those in the immature group. Logistic regression analysis models showed anastomosis vein diameter at 1 month after surgery ( OR=0.577, 95% CI 0.342-0.975, P=0.040), brachial arterial blood flow at 1 month after surgery ( OR=0.988, 95% CI 0.996-1.000, P=0.043) and brachial arterial blood flow at 3 months after surgery ( OR=0.997, 95% CI 0.995-0.999, P=0.002) were the independent relevant factors of AVF maturation. When the anastomosis vein diameter ≥ 3.90 mm at 1 month after AVF surgery ( AUC=0.842, 95% CI 0.809-0.871, P < 0.001), the blood flow of brachial artery ≥ 446.90 ml/min at 1 month after AVF surgery ( AUC=0.880, 95% CI 0.850-0.906, P < 0.001), the critical value of the combined index of anastomotic vein diameter and blood flow of brachial artery at 1 month after fitting ≥ 0.44 ( AUC=0.889, 95% CI 0.860-0.914, P < 0.001) and brachial arterial blood flow ≥ 595.00 ml/min ( AUC=0.857, 95% CI 0.822-0.888, P < 0.001), the unassisted maturation of AVF could be predicted. Conclusions:The anastomosis vein diameter ≥ 3.90 mm at 1 month after AVF surgery, and the blood flow of brachial artery ≥ 446.90 ml/min at 3 months after AVF surgery, or the critical value of combined index of both after fitting ≥ 0.44 can predict the unassisted maturation of AVF, and one month after surgery may be the opportunity for early intervention to promote maturation.

Objective To explore the difference in efficacy between multiparametric MRI (Mp-MRI) based on prostate imaging reporting and data system version 2 (PI-RADS v2) and abbreviated biparametric MRI (Bp-MRI) in detecting prostate cancer (PCa) and clinically significant prostate cancer (csPCa), and to evaluate the consistency of image interpretation between different readers. Methods The imaging, pathological and clinical data of patients with prostatic Mp-MRI in our hospital from February 2015 to June 2018 were retrospectively analyzed. At the beginning, 250 patients were randomly selected. Two radiologists visually evaluated the images of those patients using two 5-point scoring schemes based on Mp-MRI and Bp-MRI. The remaining cases were independently proceeded by one of the radiologists using two schemes respectively. Weighted Kappa test was used to assess the consistency of the results interpreted by the two radiologists. The receiver operating characteristic (ROC) curve was used to evaluate the efficiency of the two scoring schemes in detecting PCa and csPCa, and with Z test to investigate whether there was any difference in detection efficiency between the two schemes. Results Nine hundred and seventy eight patients were eventually enrolled in the study. The results of the consistency assessment showed that there was good agreement between the two radiologists, whether using Mp-MRI or Bp-MRI, with the weighted Kappa coefficient of 0.800 and 0.812, respectively. The ROC curve analysis showed that the area under the curve (AUC) of PCa detected by Mp-MRI and Bp-MRI was 0.873 and 0.879, respectively, and the AUC of csPCa detected was 0.922 and 0.932, respectively. In addition, there was no statistically significant difference between the AUC of PCa and csPCa detected by the two schemes (P>0.05). Conclusion The Bp-MRI scoring scheme has good stability in the evaluation of benign and malignant prostate, and its detection efficiency of PCa or csPCa is not lower than that of standard Mp-MRI based on PI-RADS v2.

Recently, with the development and the continuous improvement of various CRISPR systems represented by CRISPR/Cas9, gene editing technology has been gradually improved, and widely applied to the preparation of animal models of human diseases. The gene edited animal models provide important materials for the study of pathogenesis, pathological process, prevention and treatment of human diseases. At present, the gene edited animal models used in human disease research include mainly the rodent models represented by mice and rats, and large animal models represented by pigs. Among them, rodents differ greatly from humans in all aspects of their bodies and have short life span as well, which cannot provide effective evaluation and long-term tracking for the research and treatment of human diseases. On the other hand, pig is closer to human in physiology, anatomy, nutrition and genetics, which provides an important animal model in the field of organ transplantation and human disease research. In this paper, the application of the gene edited animal models was summarized in the researches of 5 human diseases such as neurodegenerative diseases, familial hypertrophic cardiomyopathy, cancer, immunodeficiency diseases and metabolic diseases. We hope this paper will provide a reference for the research of human diseases and the preparation of relative animal models.
Animals ; CRISPR-Cas Systems ; Clustered Regularly Interspaced Short Palindromic Repeats ; Disease Models, Animal ; Gene Editing ; Humans