Objective To analyze the clinical and therapeutic characteristics of Epstein-Barr virus (EBV)-negative posttransplant lymphoproliferative disease (PTLD) with diffuse large B-cell lymphoma (DLBCL) in the context of specific cases and literature. Methods A case of EBV-negative DLBCL (GCB type) after kidney transplantation is reported. The patient was a 45-year-old male who underwent living-related kidney transplantation in 2016 and has been receiving triple immunosuppressive therapy with tacrolimus, mycophenolate mofetil and methylprednisolone since then. In 2024, the patient presented with intermittent fever, night sweats and gastrointestinal symptoms. The diagnosis was confirmed by endoscopic pathology, immunohistochemical staining and positron emission tomography/computed tomography. The R-CDOP regimen (rituximab + cyclophosphamide + liposomal doxorubicin + vincristine + dexamethasone) was used for treatment. Results The patient was diagnosed with EBV-negative DLBCL (GCB type, Ann Arbor stage Ⅳ B). After 4 cycles of R-CDOP chemotherapy, the efficacy assessment was partial remission, and the transplant kidney function remained stable. Conclusions For EBV-negative PTLD after kidney transplantation, it is necessary to break through the "virus-dependent" diagnostic thinking. In clinical practice, the focus should be on protecting the transplant kidney, and individualized treatment plans should be developed for patients.

Objective To explore the feasibility of magnetic compression technique (MCR) in the treatment of severe single mid-ureteral stricture in a rabbit model. Methods After 10 female New Zealand rabbits were selected, the distal end of the right ureter was ligated with silk thread. Two weeks after the operation, when the right ureter was dilated, the mid-ureter was ligated again with silk thread to create a severe single mid-ureteral stricture animal model. Longitudinal incisions were made at the upper and lower ends of the ligation site, and cylindrical NdFeB magnets with central holes (sub-magnets and main magnets) were placed to anastomose and recanalize the mid-ureteral stricture. The magnets were adjusted to the appropriate position to automatically align and attract each other. The longitudinal incision sites of the ureter were sutured with 6-0 Prolene thread, and the abdominal cavity was closed layer by layer. The operation time was recorded. X-ray films were taken every two days to confirm the position of the magnets and record the time of magnet detachment. Three weeks after the operation, the anastomotic specimens were obtained, and the formation of the anastomosis was evaluated with gross observation and histological staining. Results Two weeks after ligation, all experimental rabbits showed obvious dilation of the right ureter. The mid-ureteral ligation and placement of the male and female magnets were successfully completed in all 10 experimental rabbits, with an operation time of (24.00±5.15)minutes. The male and female magnets attracted each other well. X-ray examination showed that the magnets detached and entered the distal ureter (14.0±1.9) days after magnetic compression. The recanalization of the severe single mid-ureteral stricture was successfully achieved. The gross specimens and histological examination of the anastomosis showed that the anastomosis remained patent and the mucosal healing was good. All experimental rabbits survived well after the operation without serious complications. Conclusion MCT provides a new idea and novel method for the treatment of mid-ureteral stricture. This study confirmed the feasibility of this technique in treating severe single mid-ureteral stricture in a rabbit model. The operation is relatively simple and has potential for clinical application.

BACKGROUND: The primary limitation to kidney transplantation is organ shortage. Recent progress in gene editing and immunosuppressive regimens has made xenotransplantation with porcine organs a possibility. However, evidence in pig-to-human xenotransplantation remains scarce, and antibody-mediated rejection (AMR) is a major obstacle to clinical applications of xenotransplantation. METHODS: We conducted a kidney xenotransplantation in a brain-dead human recipient using a porcine kidney with five gene edits (5GE) on March 25, 2024 at Xijing Hospital, China. Clinical-grade immunosuppressive regimens were employed, and the observation period lasted 22 days. We collected and analyzed the xenograft function, ultrasound findings, sequential protocol biopsies, and immune surveillance of the recipient during the observation. RESULTS: The combination of 5GE in the porcine kidney and clinical-grade immunosuppressive regimens prevented hyperacute rejection. The xenograft kidney underwent delayed graft function in the first week, but urine output increased later and the single xenograft kidney maintained electrolyte and pH homeostasis from postoperative day (POD) 12 to 19. We observed AMR at 24 h post-transplantation, due to the presence of pre-existing anti-porcine antibodies and cytotoxicity before transplantation; this AMR persisted throughout the observation period. Plasma exchange and intravenous immunoglobulin treatment mitigated the AMR. We observed activation of latent porcine cytomegalovirus toward the end of the study, which might have contributed to coagulation disorder in the recipient. CONCLUSIONS 5GE and clinical-grade immunosuppressive regimens were sufficient to prevent hyperacute rejection during pig-to-human kidney xenotransplantation. Pre-existing anti-porcine antibodies predisposed the xenograft to AMR. Plasma exchange and intravenous immunoglobulin were safe and effective in the treatment of AMR after kidney xenotransplantation.
Transplantation, Heterologous/methods* ; Kidney Transplantation/methods* ; Heterografts/pathology* ; Immunoglobulins, Intravenous/administration & dosage* ; Graft Survival/immunology* ; Humans ; Animals ; Sus scrofa ; Graft Rejection/prevention & control* ; Kidney/pathology* ; Gene Editing ; Species Specificity ; Immunosuppression Therapy/methods* ; Plasma Exchange ; Brain Death ; Biopsy ; Male ; Aged

[Objective] To explore the clinical features of IgG4-related urinary diseases so as to provide reference for the diagnosis and treatment of such diseases. [Methods] The clinical data of 4 cases of IgG4-related urinary system diseases diagnosed and treated in Xijing Hospital of Air Force Medical University during Aug.2019 and Dec.2023 were retrospectively collected.Here, we report on the diagnosis and treatment of these patients, analysing their symptoms, serology, imaging and pathology as well as their treatment and outcomes. [Results] The patients included 2 male and 2 female.The lesions were involved with the retroperitoneum and urinary system.Three patients had symptoms of lumbar pain.The imaging manifestations were complex, including retroperitoneal mass involving urinary system organs in 2 cases, tabdense shadow of the right kidney in 1 case, and simple cystic mass of kidney in 1 case.Serum IgG4 value was not detected before surgery.All patients underwent radical surgical treatment.Postoperative pathology showed fibrous tissue hyperplasia with a large number of plasma cells, lymphocytes, a few neutrophil infiltrates, and lymphoid follicles and obliterated vasculitis in some specimens.The number of IgG4⁺ plasma cells was more than 10 in all tissues under high power microscope.After surgery, 3 patients had symptoms improved, and serum IgG4 value was within the normal range; 1 patient (patem 3) had elevated IgG4 value during follow-up, received subsequent hormone therapy, and the serum IgG 4 level remained stable. [Conclusion] The symptoms of IgG4-related diseases involving the urinary system are non-specific, and the imaging findings are various, easily confused with other diseases.Early detection of serum IgG4 and biopsy pathology can help clinicians make correct diagnosis in the early stage.

Objective To investigate the clinical features,treatment and prognosis of primary testicular lymphoma(PTL),so as to provide reference for the standardized diagnosis and treatment of this disease.Methods Clinical data of 13 PTL cases treated in Xijing Hospital during Jan.2014 and Dec.2024 were retrospectively collected.The patients' diagnosis,treatment methods and prognosis were summarized.Results All 13 patients underwent orchiectomy of the affected side.According to the postoperative pathological results,11 cases were diagnosed as diffuse large B-cell lymphoma and 2 as NK/T-cell lymphoma.Among the 11 cases with diffuse large B-cell lymphoma,10 received immunotherapy and chemotherapy according to the international standardized treatment plan,and 5 received preventive myeloablative injection therapy.Recurrence in the contralateral testis occurred in 3 cases,1 complicated with central nervous system infiltration died,and another 1 refusing chemotherapy had contralateral testicular metastasis.Of the 2 cases with NK/T-cell lymphoma,1 received systemic chemotherapy and died after central nervous system recurrence,and another 1 died 1 month after surgery whithout undergoing chemotherapy.Conclusion Primary testicular lymphoma is highly invasive with poor prognosis.Patients with NK/T-cell lymphoma have extremely poor prognosis,while those with diffuse large B-cell lymphoma have relatively better prognosis.However,even after comprehensive treatment,it is still prone to recurrence in the testis and the central nervous system.

Objective To investigate the clinical features,treatment and prognosis of primary testicular lymphoma(PTL),so as to provide reference for the standardized diagnosis and treatment of this disease.Methods Clinical data of 13 PTL cases treated in Xijing Hospital during Jan.2014 and Dec.2024 were retrospectively collected.The patients' diagnosis,treatment methods and prognosis were summarized.Results All 13 patients underwent orchiectomy of the affected side.According to the postoperative pathological results,11 cases were diagnosed as diffuse large B-cell lymphoma and 2 as NK/T-cell lymphoma.Among the 11 cases with diffuse large B-cell lymphoma,10 received immunotherapy and chemotherapy according to the international standardized treatment plan,and 5 received preventive myeloablative injection therapy.Recurrence in the contralateral testis occurred in 3 cases,1 complicated with central nervous system infiltration died,and another 1 refusing chemotherapy had contralateral testicular metastasis.Of the 2 cases with NK/T-cell lymphoma,1 received systemic chemotherapy and died after central nervous system recurrence,and another 1 died 1 month after surgery whithout undergoing chemotherapy.Conclusion Primary testicular lymphoma is highly invasive with poor prognosis.Patients with NK/T-cell lymphoma have extremely poor prognosis,while those with diffuse large B-cell lymphoma have relatively better prognosis.However,even after comprehensive treatment,it is still prone to recurrence in the testis and the central nervous system.

Objective:To investigate potential factors associated with nephrocalcinosis in children with X-linked hypophosphatemic rickets (XLH).Methods:A case-control study was conducted involving XLH children who were regularly followed up at Children′s Hospital of Nanjing Medical University, from January 2016 to January 2024.Patients diagnosed with nephrocalcinosis were assigned to the case group, and those without nephrocalcinosis served as controls.A retrospective analysis was performed to examine the correlation between nephrocalcinosis and laboratory parameters, as well as the diagnostic value of relevant factors.Multivariable Logistic regression was used to identify factors associated with nephrocalcinosis in children with XLH.Receiver operating characteristic (ROC) curves were plotted for the significant factors, and the areas under the curve (AUC) were compared using Delong′s test to evaluate differences in predictive performance.Results:Univariate analysis revealed significant differences between the case and control groups in serum calcium, urinary calcium, urinary calcium/creatinine ratio, urinary phosphorus, and renal tubular maximum reabsorption rate of phosphate/glomerular filtration rate (TmPi/GFR) (all P<0.05).However, multivariate logistic regression analysis identified only urinary calcium ( B=0.489, P=0.001) and TmPi/GFR ( B=-0.886, P=0.007) as independent predictors, while the urinary calcium/creatinine ratio was not statistically significant.The sensitivity, specificity, optimal cutoff value, and AUC for urinary calcium in predicting nephrocalcinosis were 0.842, 0.833, 0.614 mmol/L, and 0.851 ( P<0.01), respectively.For TmPi/GFR, the corresponding values were 0.900, 0.877, 0.573 mmol/L, and 0.875 ( P<0.01).The Delong test showed no significant difference in AUC between the combined indicator and TmPi/GFR ( Z=-1.555, P=0.120) or urinary calcium alone ( Z=-1.598, P=0.110). Conclusions:Urinary calcium and TmPi/GFR are significantly associated with nephrocalcinosis in children with XLH and demonstrate good predictive performance for early detection.The combination of these two indicators does not outperform either individual marker in diagnostic accuracy.

Objective:To investigate potential factors associated with nephrocalcinosis in children with X-linked hypophosphatemic rickets (XLH).Methods:A case-control study was conducted involving XLH children who were regularly followed up at Children′s Hospital of Nanjing Medical University, from January 2016 to January 2024.Patients diagnosed with nephrocalcinosis were assigned to the case group, and those without nephrocalcinosis served as controls.A retrospective analysis was performed to examine the correlation between nephrocalcinosis and laboratory parameters, as well as the diagnostic value of relevant factors.Multivariable Logistic regression was used to identify factors associated with nephrocalcinosis in children with XLH.Receiver operating characteristic (ROC) curves were plotted for the significant factors, and the areas under the curve (AUC) were compared using Delong′s test to evaluate differences in predictive performance.Results:Univariate analysis revealed significant differences between the case and control groups in serum calcium, urinary calcium, urinary calcium/creatinine ratio, urinary phosphorus, and renal tubular maximum reabsorption rate of phosphate/glomerular filtration rate (TmPi/GFR) (all P<0.05).However, multivariate logistic regression analysis identified only urinary calcium ( B=0.489, P=0.001) and TmPi/GFR ( B=-0.886, P=0.007) as independent predictors, while the urinary calcium/creatinine ratio was not statistically significant.The sensitivity, specificity, optimal cutoff value, and AUC for urinary calcium in predicting nephrocalcinosis were 0.842, 0.833, 0.614 mmol/L, and 0.851 ( P<0.01), respectively.For TmPi/GFR, the corresponding values were 0.900, 0.877, 0.573 mmol/L, and 0.875 ( P<0.01).The Delong test showed no significant difference in AUC between the combined indicator and TmPi/GFR ( Z=-1.555, P=0.120) or urinary calcium alone ( Z=-1.598, P=0.110). Conclusions:Urinary calcium and TmPi/GFR are significantly associated with nephrocalcinosis in children with XLH and demonstrate good predictive performance for early detection.The combination of these two indicators does not outperform either individual marker in diagnostic accuracy.

Objective : To analyze the length of hospital stay of patients with heart failure in a multicenter cohort in order to explore the influencing factors of length of stay and provide data support for further intervention. Methods: A total of 2 794 patients enrolled in the multicenter prospective heart failure cohort were divided into two groups: long hospital stay group (≥9 days) and short hospital stay group ( < 9 days) . The general data of the two groups were compared, and the factors with statistical difference in univariate analysis were included in Logistic multifactor regression analysis to explore the difference in length of hospital stay between the two groups. According to left ventricular ejection fraction(LVEF), patients were divided into heart failure with preserved reduced ejection fraction (HFpEF)group, heart failure with mildly reduced ejection fraction(HFmrEF)group and heart failure with reduced ejection fraction(HFrEF) group, and Logistic multifactor regression analysis was performed to find influencing factors. Results : Logistic multifactor regression analysis showed that LVEF, pneumonia, N⁃terminal pro⁃B⁃type natriuretic peptide(NT⁃proBNP), serum sodium, cardiac resynchronization therapy( CRT) or implantable cardioverter defibrillator(ICD)implantation, β blockers, aldosterone receptor antagonists, positive inotropic drugs and vasodilators were all factors influencing the hospitalization of HF patients. In the HFpEF, HFmrEF, and HFrEF groupsCRT/ICD implantation, positive inotonic drugs, and vasodilator use were suggested to be common factors affecting length of hospital stay in all three groups. Conclusion LVEF, pneumonia, NT⁃proBNP, serum sodium, CRT or ICD implantation, β blockers, aldosterone receptor antagonists, positive inotropic drugs and vasodilators are the influencing factors of hospitalization time in HF patients.

Objective:To explore the effect of critical nursing combined with early warning nursing in patients with chronic obstructive pulmonary disease (COPD) complicated with respiratory failure.Methods:From October 2019 to October 2021, 92 COPD patients with respiratory failure who received non-invasive ventilator treatment in the First Affiliated Hospital of Zhengzhou University were selected as the research object by convenience sampling. According to the method of random number table, the patients were divided into the observation group and the control group, 46 cases in each. The patients in the control group received routine nursing during treatment, while the patients in the observation group received critical nursing combined with early warning nursing. Before and after intervention, the quality of life and resilience of patients were evaluated with the Generic Quality of Life Inventory-74 (GQOLI-74) and the Connor-Davidson Resilience Scale (CD-RISC) , and the complications of patients were compared.Results:Before intervention, there were no statistical differences in GQOLI-74 score and CD-RISC score between the two groups ( P>0.05) . After intervention, the GQOLI-74 scores, the total score and dimension scores of CD-RISC in the observation group were statistically higher than those in the control group ( P<0.05) . The total incidence of complications in the observation group (8.70%) was lower than that in the control group (26.09%) , with a statistically significant difference ( P<0.05) . Conclusions:Critical nursing combined with early warning nursing can improve the quality of life and psychological resilience of COPD patients complicated with respiratory failure, and reduce the incidence of complications during treatment.