F. Ben Hamida

The first year renal function as a predictor of long-term graft survival after kidney transplantation.

This study examined the impact of graft function at the end of the first year after kidney transplantation on long-term graft survival. We analyzed the roles of serum creatinine (Scr) and other variables as predictors of graft survival among 235 adult kidney transplant patients. The subjects were divided into 3 groups according to their Scr at the end of the first year: group 1, Scr < 100 micromol/L; group 2, 100 micromol/L < or = Scr < or = 150 micromol/L; and group 3, Scr >150 micromol/L. The annual rate of graft loss of 0.7% (95% confidence interval [CI], 0.63-0.77) in group 1, was lower than those in group 2 (2.1%; 95% CI, 2.02-2.18; P < .0001) and group 3 (6%; 5.74-6.26; P < .0001). Regression analysis showed the role of recipient age at the time of operation, and Scr level at the end of the first year to be independent predictors of graft loss. Graft survival was not influenced by any other studied parameter, including donor age, year of procedure, warm ischemia time, history of acute tubular necrosis, and occurrence of an acute rejection episode. We conclude that the 1-year Scr value predicts long-term renal graft survival, representing a simple, practical tool to identify recipients with an high risk for late graft failure.

Hyalohyphomycosis Caused by Paecilomyces lilacinus After Kidney Transplantation

Hyalohyphomycosis caused by Paecilomyces has rarely been described among solid organ recipients. Its management is elusive without an established consensus concerning antifungal therapy. Herein we have reported a case of extensive cellulitis caused by Paecilomyces lilacinus observed in a 48-year-old kidney transplanted woman with hepatitis C. Kidney transplantation from a cadaveric donor was performed in October 2006 with an uneventful early course except for posttransplant diabetes mellitus and a reversible acute rejection episode. Cutaneous nodular and verrucous lesions of the left leg appeared in August 2007. In a few weeks, these lesions become ulcerated, hemorrhagic, and painful. The diagnosis was made on the basis of microbiologic culture and histological examination. There was no improvement in the skin lesions after 6 weeks treatment with itraconazole, but voriconazole yielded a good response within the first 2 weeks. There was a good tolerance to antifungal therapy; graft function and liver tests remained normal. We concluded that an increasing emerging of fungal infections is observed with the introduction of more powerful immunosuppressive drugs. Diagnosis and management of such infections is elusive. Preventive measures should be considered including the adaptation of immunosuppressive therapy among at-risk patients especially those with hepatitis C virus infection and diabetics.

Kidney Transplantation: Charles Nicolle Hospital Experience

The aim of our retrospective study was to analyze the short- and long-term follow-up of 298 renal transplantations performed between June 1986 and May 2005. All were first transplantations except 4 cases, with 54 from cadaveric and 244 from living donors. The recipients included 196 males and 102 females of overall mean age of 31.21 +/- 8.9 years (range, 16-61 years). A combination of prednisolone and azathioprine was presented for 212 patients or mycophenolate mofetil for 86 patients. Polyclonal or monoclonal antibodies were used as induction therapy in 183 cases. Cyclosporine was administered to 188 cases and tacrolimus only to 16. HLA matching was 0 mismatches (MM) in 65 cases; 1 or 2 MM in 113; 3 MM in 99; and > or =4 MM in 21. Acute tubular necrosis occurred in 45 cases. One hundred eighteen patients experienced at least 1 acute rejection episode: 102 cases (41.8%) among living and 16 (29.6%) among cadaveric kidneys donor (P = .0007). The actuarial patient and graft survival rates at 1, 5, 10, 15, and 20 years were 95.9%, 87.4%, 77.5%, 65.6%, and 60.8%, and 94.9%, 84.5%, 75.4%, 65.4%, and 53%, respectively. Sixty-three patients died and 72 patients returned to dialysis. Our results were comparable to experienced centers. However, the member of kidney transplantations does not match the increased number of patients on renal replacement therapy. It is advisable to promote obtaining organs from brain-dead donors.

La fibrose rétropéritonéale

Resume Objectif Nous avons etudie les caracteristiques cliniques, therapeutiques et evolutives de la fibrose retroperitoneale. Methodes Nous avons analyse les observations de fibrose retroperitoneale diagnostiquees entre 1980 et 2002 dans notre hopital, a partir des resumes de 15 patients ayant une fibrose retroperitoneale (FRP). La surveillance therapeutique a ete fondee sur la biologie et la radiologie. Resultats Il s’agissait de 11 hommes et de 4 femmes dont l’âge moyen etait de 44,5 ans avec des extremes de 28 a 64 ans. Tous les malades avaient des douleurs essentiellement lombaires et abdominales. Un syndrome inflammatoire existait dans tous les cas et une insuffisance renale dans 11 cas. Les explorations radiologiques ont montre une hydronephrose uni ou bilaterale dans 14 cas et la plaque de fibrose dans 13 cas. Le traitement a ete constitue de corticoides seuls dans 9 cas, de chirurgie seule dans 3 cas et de chirurgie associee a la corticotherapie dans 3 cas. Dix rechutes a raison de 1 a 5 ont ete observees chez 4 malades apres arret des corticoides. Apres un delai moyen de suivi de 36 mois (18 j a 11 ans) 1 deces a ete observe, 12 patients avaient une fonction renale normale et 2 malades ont garde une insuffisance renale moderee. Conclusion Nous avons confirme la rarete de la fibrose retroperitoneale, la difficulte de son diagnostic, la frequence de la douleur, du syndrome inflammatoire et de l’insuffisance renale. Les corticoides sont efficaces et un suivi regulier est necessaire.

Nephrolithiasis-induced end stage renal disease.

Introduction: Nephrolithiasis still remains a too frequent and underappreciated cause of end stage renal disease (ESRD). Methods and patients: Of the entire cohort of 7128 consecutive patients who started maintenance dialysis in our nephrology department between January 1992 and December 2006, a total of 45 patients (26 women, 19 men) had renal stone disease as the cause of ESRD. The type of nephrolithiasis was determined in 45 cases and etiology in 42. The treatment and evolution of stone disease and patient’s survival were studied. Results: The overall proportion of nephrolithiasis related ESRD was 0.63%. The mean age was 48.4 years. Infection stones (struvite) accounted for 40%, calcium stones, 26.67% (primary hyperparathyroidism:15.56%; familial hypercalciuria: 4.44%, unknown etiology: 6.66%), primary hyperoxaluria type 1, 17.78% and uric acid lithiasis in 15.56% of cases. The mean delay of the evolution of the stone renal disease to chronic renal failure was 85.8 months. The feminine gender, obesity and elevated alkaline phosphatases >128 IU/L were significantly correlated with fast evolution of ESRD. The median evolution to ESRD was 12 months. The normal body mass index (BMI), medical treatment of stone and primary hyperoxaluria type 1 were correlated with fast evolution to ESRD. All patients were treated by hemodialysis during a mean evolution of 60 months. Sixteen patients died. The patients survival rate at 1, 3 and 5 years was 97.6, 92.8 and 69% respectively. Hypocalcemia, cardiopathy and normal calcium-phosphate product were significantly correlated with lower survival rate. Conclusion: Severe forms of nephrolithiasis remain an underestimated cause of ESRD. These findings highlight the crucial importance of accurate stone analysis and metabolic evaluation to provide early diagnosis and efficient treatment for conditions leading to ESRD.

Short- and long-term post–renal transplant follow-up at Charles Nicolle Hospital

years, 56.5%; 31 to #45 years, 33.5%; and .45 years, 4%. Primary renal disease was chronic glomerulonephritis in 85 cases (42.5%), chronic pyelonephritis in 43 (21.5%), nephroangiosclerosis in 17 (8.5%), hereditary nephropathy in 11 (5.5%), and unknown in 44 (22%). Initial renal replacement therapy (RRT) was hemodialysis (HD) in 155 cases (77.5%), continuous ambulatory peritoneal dialysis (CAPD) in 24 (12%) and the two techniques combined in 21 (10.5%). For LRD, only first-degree relatives who gave their informed consent were accepted. All patients received ABO compatible and cross-match negative kidneys. At least 3 units of blood transfusions were given to 161 patients (80.5%) and cytotoxic antibodies were screened. All patients received a combination of prednisolone: 2 mg/kg/d on day 0, tapered to 0.2 mg/kg/d on day 90 and azathioprine at 125 mg/d. Antilymphocyte globulin (ALG) or antithymocyte globulin (ATG) was used as prophylactic treatment of graft rejection in 98 cases (48%) during the first 15 days. Cyclosporine was administered in 112 patients (56%) twice daily orally at 5 mg/d beginning on day 3 to 15 days in LRD transplants with one identical haplotype and after corticoresistant acute rejection episodes. The dosages were adjusted to clinical state and cyclosporine blood level (radioimmunoassay). Acute rejection episodes were treated with a combination of pulses of methylprednisolone and ALG/ATG in 75 cases. OKT3 was introduced in six cases when ALG/ATG failed to reverse the rejection. Mycophenolate mofetil was used in 11 cases with cyclosporine nephrotoxicity. The results were expressed as mean 6 standard deviation (SD). Comparisons were made with chi squared test for categorical variables and PLSD Fisher’ test for continuous variables. The survival rates were computed using the actuarial method. P , .05 was considered statistically significant. RESULTS The waiting time on dialysis was 28 6 22 months (1 to 119 months). For LRD, the donors were 96 (52.7%) siblings, 84 (46.2%) parents, and 2 children. HLA matching was 0 mismatches (MM) in 48 cases (26.4%) and 3 MM in 134 (73.6%). Their mean age was 38.6 6 13.4 (16 to 65) years. For CAD, HLA matching was 1 to 6 MM. The cytotoxic antibodies were positive in 27% of cases. Acute tubular necrosis (ATN) occurred in 26 cases (14.3%) of LRD and in 3 (16.7%) CAD. All those patients were hemodialyzed requiring 1 to 10 sessions, but all recovered. The difference between the two groups was not statistically significant (P 5 .07). The mean time of warm ischemia was 44 6 13 minutes for patients who have expressed ATN and 41.9 6 10.9 for those without ATN. The mean time of cold ischemia for CAD was 26.8 6 6 hours. Acute rejection was encountered in 16 (33.3%) cases of LRD with 0 MM, 80 (59.7%) cases of LRD with 3 MM, and 14 (77.8%) cases in the CAD group. The differences between the three groups were statistically significant (P , .0009). Complications Infectious complications were very common (86% of cases). Viral infections occurred in 40% of cases, mostly CMV (21%) and herpes (14%). No HIV infection was seen. Bacterial infections occurred in 60% of cases, mostly urinary tract infections (49%), septicemia (11.5%), and bronchopulmonary infections (5%). Six patients had scabies. Urologic complications occurred in 31 cases: 14 (7%) urinary leaks, 6 (3%) urinary stenosis, 2 ureteral compressions, 4 lymphoceles, 3 urinary lithiasis, and 2 urinary tuberculosis. Vascular complications were seen in eight cases: two arterial thrombosis, two venous thrombosis, three arteriovenous fistulae, and one perirenal hematoma. We noted recurrence of focal segmental glomerulosclerosis in six cases and glomerulonephritis de novo in two cases.

Four successful pregnancies following kidney transplantation.

Between June 1974 and October 1998, 325 renal TR were performed. There were 225 males and 100 females. Eighty-two females had an age between 20 and 40 years, 45 of them were married, and only 15 willing to be pregnant. During the period of study, 12 PG were observed in eight women. Eight PG were terminated during the first quarter for various reasons. Only three women had a total of four successful PG. Their ages were 25, 27, and 31 at TR. Their primary renal disease was IgA nephropathy, glomerulonephritis, and indeterminate in the third woman. The interval between TR and PG was 12 years for the first patient (P1), 2 and 4 years for the second patient (P2), and 4 years for the third patient (P3). P1 and P3 received kidneys from cadaveric donors and P2 from a liverelated donor. P1 and P2 were treated with 10 mg/day of corticosteroids (CT), 125 mg/day of azathioprine (AZA), and antithymocyte globulin (ATG). P3 received 10 mg/day of CT, ATG, and 300 mg/day of cyclosporine A (CyA).

Short- and Long-Term Outcomes of Living Donors in Tunisia: A Retrospective Study

Despite initiatives to increase cadaveric donation, there is still a shortfall in donor organs. Kidneys from living donors now makes a significant contribution to increasing the number of organs available for transplantation in Tunisia. We performed a retrospective study of 405 kidney transplantations, including 321 (79.3%) from living donors performed from June 1986 to December 2007. We obtained information on only 162 (50.4%), namely, 64 men (39.5%) and 98 women (60.5%), whose mean age at the time of donation was 42.3 ± 12.2 years. Twelve (8.22%) perioperative complications occurred: wound infections (n = 4), pneumothorax (n = 4), phlebitis (n = 1), hematomas (n = 2), and urinary infection (n = 1). The mean follow-up period was 117.4 ± 74.4 months. Hypertension occurred in 42 donors (25.9%) with mean values of 134 ± 20 for systolic and 79 ± 10 for diastolic blood pressure. Twelve donors (7.4%) developed proteinuria (mean proteinuria, 0.08 ± 1.25 g/d). Renal insufficiency was found in 28 donors (19.44%), 2 of whom developed chronic renal failure requiring dialysis at intervals of 36 and 84 months. In both cases, we diagnosed a familial form of focal segmental glomerulosclerosis. Two donors (1.2%) died within 10 years after kidney donation due to senility. The relatively favorable outcomes suggest that living-donor kidney transplantation is an acceptable approach, in view of the superior results it yields in recipients. However, efforts to increase the number of cadaveric donors in Tunisia should be made. It is also important to develop a registry of long-term kidney function after kidney donation.

Acute renal cortical necrosis in pregnancy: Clinical course and changing prognosis

Obstetric cortical renal necrosis is a serious complication that can lead to chronic renal failure and the need for chronic dialysis. The aim of renal cortical necrosis therapy is to restore hemodynamic stability, institute early dialytic therapy, and treat the underlying cause of the disease. Most cases of renal cortical necrosis do not recover a normal renal function despite intensive care. We describe the course of a patient who was diagnosed with acute renal cortical necrosis in pregnancy treated with hemodialysis for three years but then she recovered her renal function.

Cyclosporine therapy in steroid-dependent or steroid-resistant idiopathic focal and segmental glomerulosclerosis

Focal and segmental glomerulosclerosis (FSGS) is a heterogeneous entity. Previous few studies have evaluated the efficacy of calcineurin inhibitors in primary FSGS and have suggested positive benefit. In this single-center, retrospective study (1975-2014), we report our experience in Tunisian adults with primary FSGS treated with cyclosporine A (CsA). It includes patients histologically proven FSGS and managed in the Charles Nicolle Hospital at Tunis, Tunisia. The dose of CsA was adjusted to maintain a whole blood trough level of 80-150 ng/mL. The observation period was 6.8 ± 3.7 years after CsA treatment. Twenty-three patients with idiopathic FSGS, treated with CsA, were studied. The mean age was 26.69 ± 10.1 years, and the sex ratio was 2.83. Eight patients (35%) had a steroid-dependent nephrotic syndrome (NS), and 15 patients (65%) had for steroid-resistant NS. After a median follow-up of 16.5 months on CsA, we noticed complete remission of the NS in eight cases (35%) after 12.12 ± 8 months, partial remission in five (22%) after 3 ± 0.7 months, dose-dependent remission to CsA (2.87 mg/kg/day) in four (17%), and a no response in six patients (26%). Eleven patients (48%) showed improvement of renal function, while eight (35%) developed end-stage renal disease (ESRD) after 35.7 ± 20.9 months. Predictive factors of progression to ESRD were creatinine clearance <90 mL/min before introduction of CsA (P = 0.0054) and CsA-resistance (P = 0.053). Our study suggests that CsA is effective in the treatment of patients with idiopathic FSGS. Initial renal function and cyclosporineresistance are the predictive factors of ESRD in steroid-resistant or -dependent FSGS.