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Objectives:To investigate the effect of fat suppression (FS) T 2WI on the interobserver agreement and diagnostic performance of clear cell likelihood score version 2.0 (ccLS v2.0) for clear cell renal cell carcinoma (ccRCC). Methods:In this retrospective study, the MR images of 111 patients with pathologically confirmed small renal masses (SRM) from January to December 2021 were analyzed in the First Medical Centre, Chinese PLA General Hospital. Of the 111 SRM, 82 cases were ccRCC and 29 cases were non-ccRCC. Two radiologists independently assessed ccLS scores based on T 2WI signal intensity (hypointense, isointense, hyperintense) and other MRI features (ccLS-T 2WI). After a one-month interval, the ccLS scores were independently evaluated utilizing the frequency-selective saturation FS-T 2WI and other MRI features (ccLS-FS-T 2WI). Fisher′s exact test was used to compare the difference in SRM signal intensity on T 2WI and FS-T 2WI. The weighted Kappa test was performed to assess the interobserver agreement of the two radiologists, and differences in the weighted Kappa coefficients were compared using the Gwet consistency coefficient. Receiver operating characteristic curves were drawn to evaluate the diagnostic performance of ccLS-T 2WI and ccLS-FS-T 2WI in diagnosing ccRCC, and the area under the curve (AUC) was compared utilizing the DeLong test. Results:The signal intensity of 111 SRM on T 2WI and FS-T 2WI had statistically significant difference (χ 2=126.33, P<0.001), consistent in 88 cases (79.3%) and varied in 23 cases (20.7%). The weighted Kappa coefficient of ccLS-T 2WI was 0.57 (95%CI 0.45-0.69) between the two radiologists, and the weighted Kappa coefficient of ccLS-FS-T 2WI was 0.55 (95%CI 0.42-0.67), and the difference was not statistically significant ( t=-0.65, P=0.520). The AUC of ccLS-T 2WI for ccRCC diagnosis was 0.92 (95%CI 0.86-0.97), while the AUC of ccLS-FS-T 2WI for ccRCC diagnosis was 0.91 (95%CI 0.85-0.96), and the difference was not statistically significant ( Z=1.50, P=0.133). Conclusions:The interobserver agreement and diagnostic performance of ccLS v2.0 based on T 2WI and FS-T 2WI sequences for ccRCC are comparable, and FS-T 2WI is applicable for the clinical application of ccLS v2.0.
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Objective To evaluate the efficacy and safety of tip-flexible ureterorenoscope (tf-URS) with holmium laser for one-stage management of parapelvic cyst.Methods The clinical data of 26 patients treated with tf-URS incision and drainage using holmium laser from February 2016 to August 2018 were reviewed.The study were including 15 male and 11 female patients,ranging from 32 to 68 years old,with an average of 53.5 years old.There were 24 cases of unilateral single renal parapelvic cyst and 2 cases of bilateral single renal parapelvic cyst.There were 4 cases in 26 cases with unilateral single renal parapelvic cyst and contralateral single renal cyst,2 cases with unilateral single renal parapelvic cyst and ipsilateral kidney of stones.The diameter of parapelvic cyst was 3.4-5.6 cm,average 4.8 cm.All patients had undergone holmium laser endo-decortication of parapelvic cyst by tf-URS.With general anesthesia,tf-URS accessed pelvis retrogradely and decorticated parapelvic cyst with 200 μm Holium laser to drainage the cyst to pelvis.If the tf-URS was not placed successfully for the first time,Double-J tubes were retained for 1-2 weeks before treatment.The operative time,hospitalization time,blood loss,postoperative complications and clinical symptoms were collected and analyzed.Results The one-time access success rate of insertion of ff-URS was 88.5％ (23/26).All operations were successful without severe complications.The average time of operation was 17.2 min,ranging from 11 to 25 min.In 3-30 months follow-up,the cysts disappeared in 22 patients and reduced by more than one half in 1 patients.Flank pain relieved in 19 patients.Conclusions Holmium laser endo-decortication of parapelvic cyst by tf-URS could be a simple,minimally invasive,safe and effective method for parapelvic cyst,which is worthy of further promotion and application in clinical practice.
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Objective To evaluate the safety and efficacy of transurethral frontfiring photoselective vaporesection for the treatment of cystitis glandularis,by comparing with the transurethral bipolar plasmakinetic resection.Methods From January 2014 to July 2016,41 patients with pathologically diagnosed cystitis glandularis in our hospital,were divided into two groups,including 22 cases underwent transurethral frontfiring photoselective vaporesection(the observation group),and the other 19 cases underwent transurethral bipolar plasmakinetic resection(the control group).All patients were regularly treated with postoperative intravesical instillation chemotherapy with pirarubicin.The clinical data of two groups were statistically analyzed to compare the differences of the safety and efficacy.Results All the surgeries were performed successfully.There were no statistical significances in perioperative data,the operation time,the decreased concentration of hemoglobin(Hb)and Na+,operative related complications, indwelling catheter duration and hospitalization duration between the two groups.The first-time cure rate and the effective rate of transurethral frontfiring photoselective vaporesection showed significantly better than those of transurethral bipolar plasmakinetic resection(P<0.05 for each).Conclusion Comparing the traditional transurethral bipolar plasmakinetic resection for the treatment of cystitis glandularis,tansurethral frontfiring photoselective vaporesection with postoperative intravesical instillation chemotherapy with pirarubicin,is a safer,simpler,and more effective method,which could be a new optional method in the conditional hospitals,deserving the worthy of clinical popularization.
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Objective To evaluate the efficacy and safety of transurethral laser shovel type vaporresection-enucleation of the prostate (LS-VREP) based on the inter-layer of surgical capsule for the treatment of benign prostatic hyperplasia (BPH),which was less 80 g weight.Methods From September 2013 to August 2016,a retrospective study was performed including 1 369 cases of BPH patients,who were treated by 120-160 W transurethral laser (straight green-light) shovel type vapor-resection-enucleation of the prostate (LS-VREP group,n =1 008) and transurethral resection of the prostate (TURP group,n =361).The preoperative data,including average age,prostate weight,IPSS,QOL,Qmax and PVR was reviewed.There was no significant difference of the above data between the two groups (P ＞ 0.05).Operative time,changes of hemoglobin and serum sodium concentration,postoperative bladder irrigation time,catheter indwelling duration,hospital stay,pre-and 3 months post-operative IPSS,QOL,Q PVR were recorded.In addition,complications were monitored.Results Mean operation time of LS-VREP group was (46.1 ± 18.6) min,while TURP group was (48.2 ± 15.2) min,and there was no difference between the two groups (P ＞ 0.05).Post-operative mean hemoglobin concentration and serum sodium concentration of LS-VREP group decreased (1.6 ± 1.2) g/L and (1.2 ± 0.6) mmol/L respectively,while those of TURP group decreased (5.7 ± 3.6) g/L and (3.2 ± 1.2) mmol/L,and the differences were statistically significant (P ＜ 0.05).Mean post-operative catheter indwelling time,and post-operative hospital stay of LS-VREP group was (42.9 ± 12.7) h and (3.2 ± 0.6) d,while TURP group was (65.7 ± 15.4) h and (5.4 ± 1.2) d,and the differences were statistically significant (P ＜ 0.05).Comparatively IPSS,QOL,Qmax and PVR were all improved significantly in both groups at 3 months after operation (P ＜ 0.05),but no significant difference was found between the two groups (P ＞ 0.05).After three months' follow-up of post-operation,as for the complication rate,including TURS,bleeding requiring reoperation,incontinence,dysuria and erectile dysfunction,LS-VREP group (15/1 008) was less than that of TURP group (30/361,P ＜ 0.05).Conclusions The LS-VREP based on the inter-layer of surgical capsule is safe and effective for the treatment of BPH patients whose prostate weight was less than 80 g.LS-VREP showed less intraoperative bleeding,faster postoperative recovery,and high safety,which is considered a safe,effective and optimized minimally invasive surgery.
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Objective To explore the clinical efficacy of modified single-portlaparoscopic radical prostatec-tomy(LRP) by atransperitoneal or extraperitoneal approach, and the impact of either approach on immune function in patients with prostate neoplasms. Methods The clinical data on 39 patients who had undergoneextraperitoneal LRP(group A) and 20 patients who had receivedtranperitoneal LRP (group B) in our department from January 2012 to December 2015 were retrospectivelyanalyzed. The prostate neoplasms were preoperatively diagnosed as cancer by ultrasound, CT or MRI, and pathological examinations. The clinical stage was T1-T2c , N0M0 in all patients.The efficacy was assessed by surgical duration, intraoperative blood loss, timeto intestinal function recovery, and post-operative hospital stay in both groups. The indicators for immune function including prostate specific antigen (TPSA and FPSA), immunoglobulin (IgG, IgA, lgM, C3, and C4) and T lymphocyte subsets (CD3+, CD4+, CD8+, CD4+/CD8+) in patientswith prostate neoplasms before and after surgery were detected. Results 59 patients were operat-ed successfully, without converting to open approach. The mean surgical duration, blood loss, time to intestinal function recovery, and postoperative hospital stay were (133.8 ± 68.6) min, (75.6 ± 51.3) mL, (2.2 ± 0.7) days, and (14.7 ± 3.6) days in group A, while (159.4 ± 78.1) min, (102.2 ± 70.8) mL, (2.9 ± 1.1) days, and (15.2 ± 4.1) days in group B. There were significant differences between the two groups (P0.05). Average postoperative follow-up was 15 months (range 3-36) in 36 patients. No recurrence or metastasis was found in all the patients by imaging studies,and no long-term complications were found. Conclusions Extraperitoneal LRP, as compared with tranperitoneal LRP, has clearer vision, fewer effects on abdominal organs, shorter surgical duration, less blood loss, faster postoperative recovery, and better protection of immune function. It is worth popularizing clin-ically.
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[Objective]To explore the biomechanical effects of preserving the remnants in anterior cruciate ligament(ACL) reconstruction under sealing the bone tunnel.[Method]Twelve skeletally matured New Zealand white rabbits underwent ACL reconstruction with preserving the remnants and sealing the bone tunnels on one knee randomly,the opposite knee was served as the paired control―ACL reconstruction with removing the remnants and sealing the bone tunnels.Rabbits were sacrificed at 12 weeks.The maximum loading of the femur-graft-tibia complexes were determined in 858 Mini BionixⅡtestor,and the rupture site was observed.[Result]The mean maximum load at 12 weeks was (23.46?7.4)N in the preserving remnants group,(18.63?4.26)N in the removing remnants group,the maximum load in the expermental group was 126% of the control.There was significant difference between two groups (t=3.058,P