Objective To analyze the clinical, imaging, pathological characteristics and prognosis of renal mucinous tubular and spindle cell carcinoma (MTSCC), so as to provide preference for the differential diagnosis and clinical management of this disease.Methods A retrospective analysis was conducted on the clinical and follow-up data of 14 patients diagnosed with renal MTSCC at the Eastern Theater Command General Hospital during June 2021 and Aug.2025.Relevant literature was reviewed.Results Of the 14 patients, 10 were female (71.4%) and 4 were male (28.6%), with a mean age of 56.9 years. Pathological staging included pT1a in 6 cases, pT1b in 7 cases, and pT2b in 1 case.The median tumor diameter was 4.5 (range 2.0-11.0) cm.Twelve cases (85.7%) were asymptomatic and detected incidentally.On ultrasonography, most tumors exhibited well-defined margins and regular morphology (9/10, 90%) and appeared as homogeneous hypoechoic masses (7/10, 70%).All lesions demonstrated hypovascular features on imaging studies.Ten patients (71.4%) underwent laparoscopic radical nephrectomy, and 4(28.6%) received partial nephrectomy.Histologically, a distinctive architecture composed of tubular structures, spindle-shaped cells, and mucinous stroma was exhibited.Immunohistochemically, the positive rates of PAX-8, VIMENTIN and CK7 in tumor cells were 100% (13/13), 91.7% (11/12) and 84.6% (11/13), respectively.The Ki-67 proliferation index ranged from 2.0% to 40.0%.During a median follow-up of 25.0 (range4.9-0.0) months, no local recurrence or distant metastasis was observed.Conclusion Renal MTSCC is a rare subtype of renal cell carcinoma, typically lacking specific clinical symptoms and characterized by hypovascular imaging features.The tumor generally follows an indolent course with a favorable prognosis.For localized tumors, partial nephrectomy should be the primary consideration.For cases with high-risk pathological features such as sarcomatoid changes, due attention should be paid to the potential invasiveness and follow-up should be closely conducted.

ObjectiveTo explore the long-term dynamic trajectories of fasting blood glucose （FBG） and insulin resistance （IR） in patients with type 2 diabetes mellitus （T2DM） and their influencing factors. MethodsThis retrospective cohort study included 1 896 T2DM patients registered at Tongren Hospital from May 2020 to May 2025. Based on longitudinal follow-up data of FBG and fasting insulin， joint latent class mixed models （JLMM） were applied to identify FBG-IR trajectories. Univariate and multinomial logistic regression was used to examine demographic characteristics， lifestyle， and clinical determinants of trajectory type. ResultsFour distinct FBG-IR trajectories were identified： stable FBG-IR （9.76%）， rising FBG-stable IR （5.01%）， stable FBG-elevated IR （75.90%）， and elevated FBG-IR （9.34%）. Compared with the stable FBG-IR group， age ≥60 years was protective against the elevated FBG-stable IR trajectory （OR=0.55， 95%CI：0.33-0.92， P=0.023）. Highereducation increased the risk of stable FBG-elevated IR （OR=1.40， 95%CI：1.01-1.94， P=0.046）. Abnormal blood pressure was associated with lower risks of stable FBG-elevated IR （OR=0.66， 95%CI：0.48-0.92， P=0.013） and elevated FBG-IR （OR=0.48， 95%CI：0.31-0.74， P=0.001）. Non-drinkers were less likely to belong to the stable FBG-elevated IR trajectory （OR=0.39， 95%CI：0.16-0.95， P=0.038）. ConclusionsThe evolution trajectory of FBG and IR in T2DM patients shows significant heterogeneity. The majority of patients have a deterioration of IR first. Age， education level， blood pressure， and alcohol consumption are the main influencing factors. Joint assessment of FBG and IR is helpful for early identification of high-risk individuals and guiding individualized intervention.

Objective To compare the detection rate and safety of transrectal cognitive fusion prostate biopsy and trans-perineal multiparametric MRI-transrectal ultrasound(mpMRI-TRUS)fusion-guided prostate biopsy.Methods The clinical data of 462 patients who underwent mpMRI at the Eastern Theater Command General Hospital from June 2021 to May 2025 were analyzed retrospectively.All patients had at least one suspicious lesion with a PI-RADS score ≥3 and subsequently underwent targeted prostate biopsy.The results of targeted biopsy combined with systematic biopsy were defined as the combined biopsy re-sults.The PCa detection rate,clinically significant PCa(csPCa)detection rate and incidence of complications were compared be-tween the two groups.Diagnostic performances of systematic,targeted and combined biopsies were also compared between the two approaches.Results In targeted biopsy,the transperineal group had significantly higher PCa and csPCa detection rates than those of the transrectal group(48.11％vs 38.19％,and 39.31％vs 29.17％,P＜0.05).There was no significant difference between the two groups in PCa and csPCa detection rates for systematic or combined biopsy(P＞0.05).The inci-dence rate of postoperative complications in the transperineal group was significantly lower than that of the transrectal group(14.78％vs 23.61％,P＜0.05).The detection rate of combined approach was significantly higher than that in either systemat-ic or targeted biopsy alone(P＜0.05).Conclusion Compared to the transrectal approach,transperineal mpMRI-TRUS image fusion-guided prostate biopsy demonstrates greater safety and higher accuracy in targeted biopsy.The combined biopsy strategy can effectively reduce the risk of missed diagnoses in patients with PCa.

Objective To explore the differences in muscle synergies of healthy individuals,intact limbs and residual limbs of above-knee amputees under different gaits,provide references for electromyographic control of the prosthetics.Methods Surface electromyography(sEMG)signals of 7 muscles(4 thigh muscles,3 calf muscles)were collected from 7 healthy individuals and 3 lower-limb amputees during level walking,ascending/descending slopes,and ascending/descending stairs.Muscle synergy weights(W)and temporal activation coefficients(H)were extracted using concatenated non-negative matrix factorization(CNMF).The W matrices were compared using the coefficient of determination R2,and the activation coefficients were analyzed using statistical parametric mapping(SPM).Furthermore,peak activation and activation integral were used for hierarchical clustering analysis.Results The comparison of W matrices indicated a similar set of muscle synergies between the healthy group and the intact limb of amputees,whereas the residual limb showed greater variability in synergies.The analysis of H showed statistically significant differences in muscle activation throughout the gait cycle for all amputees.Clustering of time-domain features revealed that amputees exhibited higher activation integral and peak values in their intact limb during ascending slopes.Conclusions This study provides an in-depth investigation of the neuromuscular compensation strategies in lower-limb amputees under different gaits,offering theoretical insights for gait rehabilitation and assisting in the development of EMG-controlled prosthetics.

Objective The aim of this study is to discuss the causal relationship between periodontal disease(PD)and prostate cancer(PCa).Methods A two-sample bidirectional Mendelian randomization(MR)analysis based on publicly statistical data from genome-wide association studies(GWAS)was conducted.MR Egger,weighted medium,simple mode and weighted mode were supplemented,while inverse variance weighted analysis(IVW)was the main method of analysis.Heterogeneity testing,pleiotropy testing and leave-one-out testing were used to assess the sensitivity and stabili-ty.Results The results of MR analysis showed that PD had no significant impact on the occurrence of PCa:East Asian(IVW,PD:OR=1.07,P=0.48);European(IVW,PD:OR=1.00,P=0.37,periodontitis:OR=1.03,P=0.14,chronic gingivitis:OR=0.99,P=0.37,chronic periodontitis:OR=1.03,P=0.22).The reverse MR analysis also did not show a causal relationship between PCa and PD:East Asian(IVW,PD:OR=0.97,P=0.22);European(IVW,PD:OR=0.84,P=0.44,periodontitis:OR=1.01,P=0.75,chronic gingivitis:OR=0.93,P=0.23,chronic periodontitis:OR=0.99,P=0.80).The results of other analysis were consistent with those of IVW analysis.Conclusions The results of our two-sample bidirectional MR analysis do not support a causal relationship between PD and PCa.

Objective To compare the detection rate and safety of transrectal cognitive fusion prostate biopsy and trans-perineal multiparametric MRI-transrectal ultrasound(mpMRI-TRUS)fusion-guided prostate biopsy.Methods The clinical data of 462 patients who underwent mpMRI at the Eastern Theater Command General Hospital from June 2021 to May 2025 were analyzed retrospectively.All patients had at least one suspicious lesion with a PI-RADS score ≥3 and subsequently underwent targeted prostate biopsy.The results of targeted biopsy combined with systematic biopsy were defined as the combined biopsy re-sults.The PCa detection rate,clinically significant PCa(csPCa)detection rate and incidence of complications were compared be-tween the two groups.Diagnostic performances of systematic,targeted and combined biopsies were also compared between the two approaches.Results In targeted biopsy,the transperineal group had significantly higher PCa and csPCa detection rates than those of the transrectal group(48.11％vs 38.19％,and 39.31％vs 29.17％,P＜0.05).There was no significant difference between the two groups in PCa and csPCa detection rates for systematic or combined biopsy(P＞0.05).The inci-dence rate of postoperative complications in the transperineal group was significantly lower than that of the transrectal group(14.78％vs 23.61％,P＜0.05).The detection rate of combined approach was significantly higher than that in either systemat-ic or targeted biopsy alone(P＜0.05).Conclusion Compared to the transrectal approach,transperineal mpMRI-TRUS image fusion-guided prostate biopsy demonstrates greater safety and higher accuracy in targeted biopsy.The combined biopsy strategy can effectively reduce the risk of missed diagnoses in patients with PCa.

Objective To understand the epidemiological characteristics and trends of postoperative pneumonia(POP)in tertiary general hospitals in Jiangsu Province,and provide theoretical basis for carrying out targeted pre-vention and control measures.Methods Surgery patients from 22 tertiary general hospitals in 12 cities in north,central,and south of Jiangsu Province from January 1,2022 to December 31,2023 were chosen as studied subjects,occurrence of POP was analyzed and compared.Results A total of 848 274 surgical procedures were performed in 22 hospitals,and 3 606 cases of POP occurred,with an incidence of 0.43％.The incidence in 2023 was 0.37％,which was lower than that in 2022(0.49％),with statistically significant difference(P＜0.001).The top three de-partments with high incidence of POP were neurosurgery(6.71％),cardiothoracic surgery(2.91％),and general surgery(0.77％).Among hospitals of different grades,the incidence of POP in tertiary first-class hospitals was 0.44％,which was higher than that in other tertiary hospitals(0.37％).There was no statistically significant difference in the incidence of POP between municipal and district/county hospitals(P＞0.05).The incidence of POP in hospitals with a bed:infection control full-time staff ratio＜200∶1 was lower than that in hospitals with the ratio ≥200∶1(0.39％vs 0.47％,P＜0.001),while the incidence of POP in hospitals with a proportion ≥30％of full-time staff being doctors was higher than that in hospitals with a proportion＜30％(0.45％vs 0.36％,P＜0.001).The incidence of POP in male patients was higher than that in female patients(0.62％vs 0.26％,P＜0.001).The incidence of POP in elderly patients aged≥65 was higher than that in patients aged＜65(0.73％vs 0.26％,P＜0.001).A total of 2 667 strains of infectious pathogens were detected,with the top three being Acine-tobacter baumannii,Klebsiella pneumoniae,and Pseudomonas aeruginosa,accounting for 28.95％,22.72％,and 15.45％,respectively.The detection rates of carbapenem-resistant Acinetobacter baumannii(CRAB),carba-penem-resistant Klebsiella pneumoniae(CRKP),and carbapenem-resistant Pseudomonas aeruginosa(CRPA)were 60.75％,21.45％,and 32.28％,respectively.The detection rate of CRKP decreased in 2023 compared with 2022,with statistically significant difference(P＜0.05).Conclusion The overall incidence of POP in tertiary general hos-pitals in Jiangsu Province is relatively low,but there are significant differences among different hospitals.There-fore,perioperative prevention and control measures should be carried out based on the epidemiological characteristics of patients.

ObjectiveTo explore the role of cucurbitacin B （CuB） in inducing ferroptosis in 4T1 cells and its mechanism. MethodsThe effects of CuB（0.2， 0.4， 0.8 μmol·L^-1）on the proliferation ability of 4T1 cells in vitro were detected using the methyl thiazolyl tetrazolium （MTT） assay. The clonogenic ability of 4T1 cells was detected by the plate cloning assay， and the levels of lactate dehydrogenase （LDH） in 4T1 cells were detected by the use of a kit. The mitochondrial membrane potential and reactive oxygen species （ROS） levels in 4T1 cells were detected by flow cytometry， and the mitochondrial ultrastructure of 4T1 cells was observed by transmission electron microscopy. The western blot was used to detect the expression of ferroptosis-related protein p53 in 4T1 cells， solute carrier family 7 member 11 （SCL7A11）， glutathione peroxidase 4 （GPX4）， long-chain acyl-CoA synthetase 4 （ACSL4）， transferrin receptor protein 1 （TFR1）， and ferritin heavy chain 1 （FTH1）. ResultsCompared with that in the blank group， the survival rate of 4T1 cells in CuB groups was significantly decreased （P<0.05）， and the number of cell clones in CuB groups was significantly reduced （P<0.01）. In addition， compared with that in the blank group， the leakage of LDH in cells in CuB groups was significantly increased （P<0.01）， and the mitochondrial membrane potential of cells in CuB groups decreased significantly （P<0.01）. Cellular ROS levels were significantly elevated in CuB groups （P<0.01）. The mitochondria of cells in CuB groups were obviously wrinkled， and the mitochondrial cristae were reduced or even disappeared. Compared with that in the blank group， the protein expression of p53， ACSL4， and TFR1 were significantly up-regulated in CuB groups （P<0.05）， and that of SLC7A11， GPX4， and FTH1 were significantly down-regulated （P<0.05）. ConclusionCuB may inhibit SLC7A11 and GPX4 expression by up-regulating the expression of p53， which in turn regulates the p53/SLC7A11/GPX4 signaling pathway axis and accelerates the generation of lipid peroxidation substrate by up-regulating the expression of ACSL4. It up-regulates TFR1 expression to promote cellular uptake of Fe³⁺ and down-regulates the expression of FTH1 to reduce the ability of iron storage， resulting in an elevated free Fe²⁺ level. It catalyzes the Fenton reaction， generates excess ROS， imbalances the antioxidant system and iron metabolism， and then induces ferroptosis in 4T1 cells.

ObjectiveTo explore the role of cucurbitacin B （CuB） in inducing ferroptosis in 4T1 cells and its mechanism. MethodsThe effects of CuB（0.2， 0.4， 0.8 μmol·L^-1）on the proliferation ability of 4T1 cells in vitro were detected using the methyl thiazolyl tetrazolium （MTT） assay. The clonogenic ability of 4T1 cells was detected by the plate cloning assay， and the levels of lactate dehydrogenase （LDH） in 4T1 cells were detected by the use of a kit. The mitochondrial membrane potential and reactive oxygen species （ROS） levels in 4T1 cells were detected by flow cytometry， and the mitochondrial ultrastructure of 4T1 cells was observed by transmission electron microscopy. The western blot was used to detect the expression of ferroptosis-related protein p53 in 4T1 cells， solute carrier family 7 member 11 （SCL7A11）， glutathione peroxidase 4 （GPX4）， long-chain acyl-CoA synthetase 4 （ACSL4）， transferrin receptor protein 1 （TFR1）， and ferritin heavy chain 1 （FTH1）. ResultsCompared with that in the blank group， the survival rate of 4T1 cells in CuB groups was significantly decreased （P<0.05）， and the number of cell clones in CuB groups was significantly reduced （P<0.01）. In addition， compared with that in the blank group， the leakage of LDH in cells in CuB groups was significantly increased （P<0.01）， and the mitochondrial membrane potential of cells in CuB groups decreased significantly （P<0.01）. Cellular ROS levels were significantly elevated in CuB groups （P<0.01）. The mitochondria of cells in CuB groups were obviously wrinkled， and the mitochondrial cristae were reduced or even disappeared. Compared with that in the blank group， the protein expression of p53， ACSL4， and TFR1 were significantly up-regulated in CuB groups （P<0.05）， and that of SLC7A11， GPX4， and FTH1 were significantly down-regulated （P<0.05）. ConclusionCuB may inhibit SLC7A11 and GPX4 expression by up-regulating the expression of p53， which in turn regulates the p53/SLC7A11/GPX4 signaling pathway axis and accelerates the generation of lipid peroxidation substrate by up-regulating the expression of ACSL4. It up-regulates TFR1 expression to promote cellular uptake of Fe³⁺ and down-regulates the expression of FTH1 to reduce the ability of iron storage， resulting in an elevated free Fe²⁺ level. It catalyzes the Fenton reaction， generates excess ROS， imbalances the antioxidant system and iron metabolism， and then induces ferroptosis in 4T1 cells.

Objective To establish a HPLC method for determining thimerosal compounds in eye drops. Methods A gradient HPLC system was used in the quantitative analysis of thimerosal compounds on Shiseido MGII C₁₈ column （4.6 mm×250 mm，5 μm）, using 1% triethylamine solution （pH adjusted to 3.0 with phosphate） as mobile phase A, the methanol as mobile phase B, gradient elution, The column temperature was 40 ℃, the detection wavelength was 222 nm, the flow rate was 1 ml/min and the injection volume was 20 µl. Results The established method had good linearity within the concentration range of 4.3-216.7 μg/ml （r>0.999） for thimerosal, with average recoveries was 102.1%, RSD2.7%. Conclusion This method was simple, accurate and highly specific, and could be used for determination of thimerosal compound in eye drops.