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David Roth

Publications and source records attributed to David Roth.

At least 19 recordsLinked to original sources

A randomized long-term trial of tacrolimus/sirolimus versus tacrolimums/mycophenolate versus cyclosporine/sirolimus in renal transplantation: three-year analysis.

BACKGROUND: We report three-year (interim) effects of combining sirolimus (Siro) vs. mycophenolate mofetil (MMF) as adjunctive therapy with calcineurin inhibitors (CI) in renal transplantation in the three different CI-based regimens. METHODS: Between May 2000 and December 2001, 150 recipients of deceased donor (DD) and living donor (LD) kidney transplants were randomized into three groups (n=50/group): Group A (Tacro/Siro), Group B (Tacro/MMF) and Group C (CsA/Siro). This report details drug dosing and monitoring, protocol discontinuance, biopsy-proven rejection, graft failure, other adverse events, and death at 36 months postoperatively. RESULTS: Actual patient and graft survival respectively in Group A was 90% and 82%, in Group B was 92% and 88%, and in Group C was 96% and 88% (not significant). Biopsy-confirmed acute rejection incidents showed a trend in favor of Group B (10%) vs. Group A (26%) and Group C (20%) combined (P=0.07). The geometric mean */SE serum creatinine concentration and arithmetic mean +/- SE Cockroft-Gault creatinine clearance calculations, respectively, were 1.39*/1.1 and 72.8+/-4.3 for Group A, 1.36*/1.1 and 72.1+/-4.1 for Group B, and 1.60*/1.1 and 61.8+/-3.8 for Group C, a statistically favorable difference for Group B over Group C (P=0.04). There was also less de novo development of posttransplant diabetes mellitus and lipid disorders in Group B vs. A and C (P<0.04). CONCLUSIONS: This three-year (interim) analysis has indicated a trend towards better graft function, fewer endocrine disorders, and fewer acute rejection episodes comparing adjunctive MMF and Tacro vs. Siro and Tacro or Siro and CsA, in the dosages used.

Adolescent↗

Barriers to successful care for chronic kidney disease.

BACKGROUND: The National Kidney Foundation has formulated clinical practice guidelines for patients with chronic kidney disease (K/DOQI). However, little is know about how many patients actually achieve these goals in a dedicated clinic for chronic kidney disease. METHODS: We performed a cross-sectional analysis of 198 patients with an estimated glomerular filtration rate of less than 30 ml/min/1.73 m2 and determined whether K/DOQI goals were met for calcium, phosphate, calcium-phosphate product, parathyroid hormone, albumin, bicarbonate, hemoglobin, lipids, and blood pressure. RESULTS: We found that only a small number of patients achieved K/DOQI targets. Recent referral to the nephrologist, failure to attend scheduled clinic appointments, African American ethnicity, diabetes, and advanced renal failure were significant predictors of low achievement of K/DOQI goals. CONCLUSION: We conclude that raising awareness of chronic kidney disease and K/DOQI goals among primary care providers, early referral to a nephrologist, the exploration of socioeconomic barriers and cultural differences, and both patient and physician education are critical to improve CKD care in patients with Stage 4 and 5 CKD.

Black or African American↗

A randomized trial of three renal transplant induction antibodies: early comparison of tacrolimus, mycophenolate mofetil, and steroid dosing, and newer immune-monitoring.

BACKGROUND: New trends in immunosuppression in clinical transplantation include the use of antibody induction agents in protocols that emphasize reduction or avoidance of steroids and calcineurin inhibitors. METHODS: In a randomized trial using three different antibody induction agents in 90 first renal transplant recipients from cadaver donors, group A received Thymoglobulin, group B received Alemtuzumab, and group C received Daclizumab. Maintenance immunosuppression included tacrolimus and mycophenolate in all three arms, and methylprednisolone in groups A and C only (standard clinical institutional practice). The targeted trough level of tacrolimus was between 8 and 10 ng/mL for groups A and C, respectively, with a targeted mycophenolate dose of 1 g twice daily. However, in group B, the target tacrolimus trough level was 4 to 7 ng/mL to reduce long-term nephrotoxicity, with 500 mg twice-daily doses of mycophenolate, without steroid maintenance. RESULTS: In this 15-month median postoperative interval report, there were no notable differences in demographics and patient and graft survivals. Acute rejection rates at 1 year were equivalent, that is, 5 of 30 in all three groups (16.6%). In group B, there was slightly lower renal function at 1 month, but no difference at 1 year. There was also significantly more leukopenia, but a greater percentage of T-regulatory cells and number of Fox-P3 mRNA copies by flow cytometry and semiquantitative polymerase chain reaction analysis, respectively, in group B. CONCLUSIONS: This preliminary analysis indicates that 80% of the patients in group B remained steroid-free 1 year postoperatively, with lower tacrolimus trough levels and no difference in other adverse events.

Adult↗

Inflow stenosis in arteriovenous fistulas and grafts: a multicenter, prospective study.

BACKGROUND: Traditionally, arteriovenous hemodialysis access inflow stenosis has been reported to occur infrequently (0% to 4%). In contrast, recent reports have suggested a significantly higher incidence (14% to 42%). Interpretation of these studies has been complicated by the presence of one or more confounding factors such as retrospective study design, small sample size, arteriovenous fistulas grouped with grafts to determine the incidence of inflow stenosis, inclusion of fistulas that had failed primarily, failure to provide adequate definition of inflow stenosis, and the technique of retrograde angiography. This is a report of a prospective, multicenter study to examine the incidence of inflow stenosis separately in arteriovenous fistulas and grafts. METHODS: Patients were referred to interventional nephrology either for percutaneous balloon angioplasty or thrombectomy procedures. Angiography to evaluate access inflow (arterial anastomosis and adjacent vascular structures) was performed in all cases. This was accomplished by retrograde angiography using either manual occlusion of the venous side and/or advancing a diagnostic catheter across the arterial anastomosis. Multiple images using digital subtraction angiography were recorded in multiple planes. An inflow stenosis was defined as stenosis within the arterial system, artery-graft anastomosis (graft cases), artery-vein anastomosis (fistula cases) and juxta-anastomotic region (the first 2 cm downstream from the arterial anastomosis). Vascular stenosis was defined as >/=50% reduction in luminal diameter judged by comparison with either the adjacent vessel or graft. A standardized definition for anastomotic stenosis was applied. RESULTS: Two hundred and twenty three consecutive procedures (grafts, 122; fistulas, 101) were performed in 158 patients. Inflow stenosis occurred in 36/122 (29%) in graft cases. All had a coexisting stenosis on the venous side. In fistula cases, 41/101 (40%) had inflow stenosis. Of these, 22 (54%) had a coexisting lesion on the venous side. Overall, inflow stenosis occurred in 77/223 procedures (35%). CONCLUSION: This prospective, multicenter study demonstrates that access inflow stenosis occurs in one third of the cases referred to interventional facilities with clinical evidence of venous stenosis or thrombosis. This is much higher than has been traditionally reported.

Adult↗

The use of Campath-1H as induction therapy in renal transplantation: preliminary results.

BACKGROUND: In an attempt to reduce both initial and long-term (nephrotoxic) calcineurin inhibitor maintenance dosage and totally eliminate maintenance corticosteroids, alemtuzumab (Campath-1H) was used as induction therapy in first cadaver and non-HLA-identical living donor renal transplantation. METHODS: Forty-four de novo renal allograft recipients were treated with Campath-1H (0.3 mg/kg) on days 0 and 4 postoperatively, preceded by methylprednisolone boluses. Maintenance target 12-hr tacrolimus trough levels of 5 to 7 ng/mL were operational from the outset as well as (reduced) mycophenolate mofetil dosage of 500 mg twice daily. No corticosteroids were planned to be given after the first week postoperatively. RESULTS: With a median follow-up of 9 (range, 1-19) months, patient and graft survival rates are each at 100%. Biopsy-proven acute rejection was diagnosed in four patients. Infections requiring hospitalization developed in four patients. Thirty-eight recipients remain without the need for long-term corticosteroid therapy. CONCLUSIONS: In an early assessment, the combination of Campath-1H, low dosing of tacrolimus and mycophenolate mofetil, and avoidance of maintenance corticosteroid use seems to be safe and effective for kidney transplant recipients. Long-term outcomes will be reported in the future.

Alemtuzumab↗

Sequential therapies for proliferative lupus nephritis.

BACKGROUND: Long-term therapy with cyclophosphamide enhances renal survival in patients with proliferative lupus nephritis; however, the beneficial effect of cyclophosphamide must be weighed against its considerable toxic effects. METHODS: Fifty-nine patients with lupus nephritis (12 in World Health Organization class III, 46 in class IV, and 1 in class Vb) received induction therapy consisting of a maximum of seven monthly boluses of intravenous cyclophosphamide (0.5 to 1.0 g per square meter of body-surface area) plus corticosteroids. Subsequently, the patients were randomly assigned to one of three maintenance therapies: quarterly intravenous injections of cyclophosphamide, oral azathioprine (1 to 3 mg per kilogram of body weight per day), or oral mycophenolate mofetil (500 to 3000 mg per day) for one to three years. The base-line characteristics of the three groups were similar, with the exception that the chronicity index was 1.9 points lower in the cyclophosphamide group than in the mycophenolate mofetil group (P=0.009). RESULTS: During maintenance therapy, five patients died (four in the cyclophosphamide group and one in the mycophenolate mofetil group), and chronic renal failure developed in five (three in the cyclophosphamide group and one each in the azathioprine and mycophenolate mofetil groups). The 72-month event-free survival rate for the composite end point of death or chronic renal failure was higher in the mycophenolate mofetil and azathioprine groups than in the cyclophosphamide group (P=0.05 and P=0.009, respectively). The rate of relapse-free survival was higher in the mycophenolate mofetil group than in the cyclophosphamide group (P=0.02). The incidence of hospitalization, amenorrhea, infections, nausea, and vomiting was significantly lower in the mycophenolate mofetil and azathioprine groups than in the cyclophosphamide group. CONCLUSIONS: For patients with proliferative lupus nephritis, short-term therapy with intravenous cyclophosphamide followed by maintenance therapy with mycophenolate mofetil or azathioprine appears to be more efficacious and safer than long-term therapy with intravenous cyclophosphamide.

Adult↗

A randomized long-term trial of tacrolimus and sirolimus versus tacrolimus and mycophenolate mofetil versus cyclosporine (NEORAL) and sirolimus in renal transplantation. I. Drug interactions and rejection at one year.

BACKGROUND: To reduce long-term nephrotoxic calcineurin inhibitor dosage, adjunctive sirolimus or mycophenolate mofetil (MMF) was used in a 150-patient, randomized, three-armed trial in cadaveric or human leukocyte antigen non-identical living-donor first renal transplant recipients (n=50/group). METHODS: Group A received tacrolimus and sirolimus. Target tacrolimus trough levels postoperatively were 10, 8, and 6 ng/mL at 1 month, 6 months, and 1 year, respectively. Group B received tacrolimus and MMF. Target tacrolimus trough levels were 10 and 8 ng/mL at 1 month and 1 year, with a targeted dose of MMF of 1 g twice daily. Group C received cyclosporine A (CsA) (Neoral, Novartis, Basel, Switzerland) and sirolimus with target CsA trough levels of 225 and 175 ng/mL at 1 month and 1 year. Maintenance sirolimus target trough levels were 8 ng/mL in groups A and C. Each group received daclizumab induction and methylprednisolone maintenance. This first of two companion 1-year reports details demographics, drug-dosing interactions, and rejection. RESULTS: There were no notable differences in group demographics, but a somewhat less favorable course occurred in group C, despite higher bioavailability of sirolimus in group C versus group A (P<0.001). Acute rejection rates were lower in groups A (4%) and B (4%) combined versus group C (14%) (P=0.03). Histopathologic findings were supported by comparing perioperative with 1-year postoperative protocol biopsies. CONCLUSIONS: This 1-year interim analysis indicates that a decreasing dosage of tacrolimus with either adjunctive sirolimus or MMF may optimize future graft survival versus a less favorable outcome using a similar algorithm with CsA and sirolimus.

Adult↗

A randomized long-term trial of tacrolimus/sirolimus versus tacrolimus/mycophenolate mofetil versus cyclosporine (NEORAL)/sirolimus in renal transplantation. II. Survival, function, and protocol compliance at 1 year.

BACKGROUND: In an attempt to reduce chronic calcineurin inhibitor induced allograft nephropathy in first cadaver and human leukocyte antigen non-identical living-donor renal transplantation, sirolimus (Siro) or mycophenolate mofetil (MMF) was tested as adjunctive therapy, with planned dose reductions of tacrolimus (Tacro) over the first year postoperatively. Adjunctive Siro therapy with a similar dose reduction algorithm for Neoral (Neo) was included for comparison. METHODS: The detailed dose reduction plan (Tacro and Siro, group A; Tacro and MMF, group B; Neo and Siro, group C) is described in our companion report in this issue of Transplantation. The present report documents function, patient and graft survival, protocol compliance, and adverse events. RESULTS: As mentioned (in companion report), group demographics were similar. The present study shows no significant differences in 1-year patient and graft survival but does show a trend that points to more difficulties in group C by way of a rising slope of serum creatinine concentration (P=0.02) and decreasing creatinine clearance (P=0.04). There were more patients who discontinued the protocol plan in group C. Thus far, no posttransplant lymphomas have appeared, and infectious complications have not differed among the groups. However, a greater percentage of patients in group C were placed on antihyperlipidemia therapy, with an (unexpected) trend toward a higher incidence of posttransplant diabetes mellitus in this group. Group A required fewer, and group B the fewest, antihyperlipidemia therapeutic interventions (P<0.00001). CONCLUSIONS: This 1-year interim analysis of a long-term, prospective, randomized renal-transplant study indicates that decreasing maintenance dosage of Tacro with adjunctive Siro or MMF appears to point to improved long-term function, with reasonably few adverse events.

Creatinine↗

Cytomegalovirus prophylaxis with valganciclovir in kidney, pancreas-kidney, and pancreas transplantation.

Cytomegalovirus, seen in more than 50% of solid organ transplant recipients, is responsible for numerous direct and indirect consequences, including infection with opportunistic pathogens and allograft rejection. Prophylaxis with intravenous ganciclovir has been the gold standard for prevention; however, intravenous treatment is expensive and carries risks of its own. Oral ganciclovir, to be effective, must be given in large, divided doses. Valganciclovir, the valine ester of ganciclovir, at 900 mg/day, provides oral bioavailability equivalent to that of intravenous ganciclovir and superior to that of oral ganciclovir. This retrospective study assessed the efficacy of 3 months prophylaxis with valganciclovir in kidney, simultaneous pancreas-kidney, and pancreas transplantation. Of 161 patients, all of whom received potent immunosuppressive regimens and were followed for a mean of 440 days, only one developed cytomegalovirus infection, at 120 days post-transplantation. Two patients died, and two others lost their grafts. There were seven incidents of acute rejection. Only seven patients discontinued treatment early, five because of leukopenia. These results suggest that prophylaxis with 900 mg/day of valganciclovir for at least 3 months safely and effectively prevents cytomegalovirus infection in kidney, simultaneous pancreas-kidney and pancreas transplant recipients on highly potent immunosuppression.

Adolescent↗

Hypercoagulable state associated with kidney-pancreas transplantation. Thromboelastogram-directed anti-coagulation and implications for future therapy.

BACKGROUND: The clinical consequences of type 1 diabetes mellitus (IDDM) include diabetic triopathy: retinopathy, nephropathy, and neuropathy, as well as microangiopathy, accelerated atherosclerotic disease, and hypercoagulability. The etiology of the hypercoagulability is multifactorial, involving various clotting factors or pathways (for example platelets, fibrinogen, individual components of the clotting system and/or fibrinolysis in different studies). The development of end-stage renal disease (ESRD), with the uremia-related platelet effect has the potential to protect from the existing hypercoagulable state. This has important implications for surgery, particularly simultaneous pancreas-kidney (SPK) transplantation, where the pancreas has historically been prone to thrombosis. This has led us to perform intra-operative thromboelastograms (TEG's) to evaluate the patient's current coagulation status. METHODS: A TEG was performed in 85 SPK recipients along with a control group of 54 non-diabetic kidney transplant (KT) recipients. RESULTS: For each of the 4 TEG coagulation parameters, the SPK recipients were significantly more hypercoagulable than the non-diabetic KT recipients. The use of intra-operative heparin is based on the degree of hypercoagulability by TEG and degree of operative hemostasis. There has been one PT lost to thrombosis (1%) in the first week following transplantation during this time. CONCLUSION: The use of TEG is a helpful adjunct to SPK surgery, demonstrating the patient's current coagulation status. Nearly all SPK recipients (type 1 IDDM with ESRD) have been demonstrated to be hypercoagulable. The TEG allows the judicious use of anti-coagulation at the time of surgery, and beyond.

Anticoagulants↗

Economic and clinical disparities in hospitalized patients with type 2 diabetes.

PURPOSE: To identify and describe economic and clinical relationships and trends associated with selected access, equity, and outcome characteristics of a large inpatient population with Type 2 diabetes. DESIGN: Longitudinal, descriptive cross-sectional study with secondary analyses of data about 101,944 patients in hospitals in the United States (US), 40 years of age and older with a primary diagnosis of Type 2 diabetes from the Health Care Cost and Utilization Project (HCUP-3) database for 1994-1997. METHODS: Descriptive analysis, hierarchical, random-effects regression modeling, and contrasts between covariate-adjusted means. Hospital charge data were highly skewed in a positive direction requiring a logarithmic transformation. Variables for the study included both hospital and patient characteristics. FINDINGS: Significant racial and sex disparities were found in health care access, equity, and outcomes, with equity characteristics showing alarming disparities in types of procedures (amputations and peripheral vascular bypass grafts) performed, lengths of stay, and dispositions. CONCLUSIONS: Disparities in health care access, equity, and outcomes continue to exist on the basis of sex, ethnicity, and age as well as the type and location of the hospital. Access and equity are values that, despite rhetoric in relation to health care utilization, have not been systematically attained.

Aged↗

Predictors of time to nursing home placement in White and African American individuals with dementia.

OBJECTIVE: This study examined the influence of racial group identification on nursing home placement (NHP) for individuals with dementia before and after adjusting for the possible mediating effects of the caregiving context as defined by stress-process variables in 215 caregiver/care recipient dyads. METHOD: Demographics, problem behaviors, self-care impairment, and caregiver appraisal, social support, psychological well-being, and coping were used to prospectively predict Time to NHP. RESULTS: Race was a significant predictor of NHP with African American care recipients placed significantly slower than White care recipients. Race remained a significant predictor of Time to NHP after controlling for other variables that showed independent association with Time to NHP and stress-process variables. DISCUSSION: Findings suggest that stress-process variables are critical factors in Time to NHP; however, these variables do not explain fully the difference in Time to NHP seen in White and African American care recipients.

Adaptation, Psychological↗

Developing a comprehensive diagnostic and interventional nephrology program at an academic center.

Procedure-related delays in the treatment of patients with renal disease can be minimized and nephrology care can be delivered more efficiently by a nephrologist trained in nephrology-related procedures. Referrals to a radiologist for renal ultrasound and biopsy, to a surgeon for dialysis access placement, and to an interventional radiologist for dialysis catheter placement and vascular access procedures are time consuming and inconvenient to patients with renal disease. Moreover, such an approach may result in delays in the availability of critical diagnostic information and a break in the continuity of care. In an effort to optimize the care of nephrology patients, we developed a diagnostic and interventional nephrology (DIN) program that effectively deals with nephrology-related procedures in a timely manner. At present, some of the commonly performed nephrology-related procedures at our center include diagnostic ultrasonography, ultrasound-guided renal biopsy, peritoneal dialysis access procedures, permanent tunneled hemodialysis catheter placement, and endovascular procedures for arteriovenous dialysis access dysfunction. To date, we have performed 893 procedures during a period of 2 years. This article describes our approach and the tools required to develop a DIN program at an academic medical center.

Academic Medical Centers↗

The use of daclizumab as induction therapy in combination with tacrolimus and mycophenolate mofetil in recipients with previous transplants.

Clinical trials using daclizumab as induction therapy in combination with tacrolimus (TAC) and mycophenolate mofetil (MMF) have been shown to reduce the incidence of acute rejection episodes in solid organ transplantation. In an attempt to obtain a low rejection rate we proceeded with the use of daclizumab as induction therapy, in combination with TAC and MMF for recipients with previous transplants. In this study, we analyzed patients who received previous transplants, treated with the above immunosuppressive regimen. Group A consisted of four patients with previous liver transplants, group B consisted of 16 recipients with previous kidney transplants and group C consisted of three patients with previous simultaneous pancreas-kidney transplants. All patients underwent cadaveric kidney transplants except one patient in group B, who underwent a pancreas transplant. At 12 months, patient and graft survival for all groups was 100 and 100%, respectively. Acute rejection rate was 0% for group A, 12.5% for group B, and 0% for group C. Daclizumab induction therapy is effective for patients with previous transplants and does not appear to increase the risk of acute rejection.

Adolescent↗

The use of daclizumab, tacrolimus and mycophenolate mofetil in african-american and Hispanic first renal transplant recipients.

Limited data are available on the use of tacrolimus and mycophenolate mofetil in conjunction with anti-IL-2 receptor antibody, in groups of kidney transplant recipients considered to be at higher risk. This study compared the incidence of acute rejection between African-American (AA), Hispanic (H), and non-African-American, non-Hispanics (non-AA, non-H) first renal transplant recipients. We studied 233 sequential first renal transplants. Of the 233, 37 recipients (16%) were AA, 85 (36.5%) were H and 111 (47.5%) were non-AA, non-H. All received daclizumab induction therapy (1 mg/kg) on the day of surgery, and every other week for a total of 5 doses, as well as mycophenolate mofetil, tacrolimus, and steroids. At 1 year, patient and graft survival were 97% and 95% in AA, 98% and 98% in H, and 96% and 95% in non-AA, non-H, respectively (not statistically different). Biopsy-proven acute rejection episodes were 8.1% in AA, 4.7% in H, and 4.5% in non-AA, non-H (also not statistically different). This immunosuppressive protocol appears to be safe and effective in helping to minimize biopsy-proven acute rejection and optimize renal allograft survival in African-American and Hispanic renal transplant recipients in the first year post transplantation.

Adult↗

Peritoneoscopic placement of peritoneal dialysis catheter and bowel perforation: experience of an interventional nephrology program.

BACKGROUND: Bowel perforation is an uncommon but serious complication of peritoneoscopic peritoneal dialysis (PD) catheter insertion. The approach to diagnosis of bowel perforation utilizing this technique has not been previously published. The authors report their experience with the diagnosis and management of bowel perforation in the context of peritoneoscopic placement of PD catheters. METHODS: The authors retrospectively reviewed the records of 750 PD catheters inserted over a 12-year period (January 1991 to May 2003) utilizing peritoneoscopic technique. RESULTS: Six (0.8%) patients experienced bowel perforation during the procedure. The diagnosis was made immediately during the procedure in 5 (83%) of the 6 patients. Of these 5, peritoneoscopy confirmed intrabowel position of the cannula by visualizing bowel mucosa (n = 3) and hard stool (n = 1). The fifth patient showed extrusion of fecal matter upon trocar withdrawal before peritoneoscopy. All 5 had emanation of foul-smelling gas through the cannula. Bowel rest and broad-spectrum intravenous antibiotics were initiated. Of the 5, 1 required surgery, whereas the others were discharged home after 3 days. The sixth patient had fever, severe peritoneal irritation, and polymicrobial peritonitis the morning after the procedure. In this patient, no evidence of bowel injury was noted during the procedure except for brief emanation of foul-smelling gas. He required surgical intervention. CONCLUSION: Bowel perforation can be diagnosed immediately in most patients undergoing peritoneoscopic PD catheter insertion. A majority of these patients can be treated medically. The surgical team should be consulted if the patient shows clinical deterioration or has signs of peritoneal irritation.

Abdomen, Acute↗

Short-term, high-dose pamidronate-induced acute tubular necrosis: the postulated mechanisms of bisphosphonate nephrotoxicity.

A 76-year-old man had biopsy-proven acute tubular necrosis (ATN) after intravenous administration of 3 doses of 60 mg of pamidronate (Aredia) over a 2-week period. Pamidronate was given to treat hypercalcemia of unknown etiology. Other potential causes of acute renal failure were excluded with appropriate investigations. The patient's preexisting renal impairment in the context of high-doses of pamidronate might have been a potentiating factor for nephrotoxicity. The ATN encountered in this patient resolved; however, short-term hemodialysis was needed. To the best of our knowledge, this is the first reported case of short-term, high-dose pamidronate-induced ATN in the absence of concomitant nephrotoxins. Although necrotic and apoptotic cell death after bisphosphonate administration has been seen in a variety of cells, the exact mechanism of nephrotoxicity is unknown. This report presents a case of pamidronate-induced ATN and discusses the potential mechanisms of bisphosphonate-induced nephrotoxicity.

Aged↗