M Ounissi

University of Tunis El Manar, Tunis-Ville, Tūnis, Tunisia

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Publications (37)23.27 Total impact

  • La Tunisie médicale 02/2014; 92(2):169.
  • La Tunisie médicale 10/2013; 91(10):613-4.
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    ABSTRACT: Urinary tract infection (UTI) is the most frequent infectious complication among renal transplant recipients and a frequent cause of bacteremia, sepsis and acute graft failure. To evaluate the incidence, risk factors, type of pathogens and long-term effect of UTIs on graft and patient survivals in our center, we performed a retrospective cohort study reviewing the medical records of patients who received a renal transplant at our center from June 1986 to December 2009, excluding patients who lost their grafts in the first month due to arterial or veins thrombosis and acute antibody-mediated rejection. We studied 393 kidney-transplanted recipients; at least one UTI occurred in 221 (53.69%) patients during the follow-up period. The most frequent pathogens isolated in urine culture were Escherichia coli (n = 39, 18.4%) and Klebsiella pneumonia (n = 31, 14.6%). When patients with UTIs were compared with those without UTIs, female gender and use of mycophenolate mofetil or azathioprine seemed to be risk factors for UTIs on univariate analysis. However, female gender was the only independent risk factor on multivariate analysis RR = 1.964 (1.202-3.207), P = 0.007. This study confirmed that UTIs remain a major problem in renal transplant recipients, and female gender was the only independent risk factor.
    Saudi journal of kidney diseases and transplantation: an official publication of the Saudi Center for Organ Transplantation, Saudi Arabia 11/2012; 23(6):1311-4.
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    ABSTRACT: The acute tubular necrosis (ATN) is common after kidney transplantation. Acute tubular necrosis (ATN) is multifactorial and represents one of the main causes of the delayed graft function. Its impact on graft and patients survival is documented. To study the prevalence of the ATN in kidney transplanted patients, the acute rejection rate and their impact on the graft and the patient survival. We retrospectively studied the frequency of ATN, its causes and its impact on patient and graft survival in 255 kidney transplanted patients between 1986-2006. Thirty-nine patients had ATN (15.29%). They are 25 men and 14 women with mean age of 30.1 ± 12.6 years (8-61) followed for an average of 98 ± 61.76 months. The majority was treated by hemodialysis (79.48%) and half of them were transplanted from kidney of deceased donor. All patients received anti lymphocyte serum and the majority anticalcineurins (69.23%). The outcome was favorable in 26 patients (66.66%) with recovery of diuresis and normalization of renal function after 6 weeks on average. An acute rejection was diagnosed in 21 patients (53.48%). The mean creatinine at 1, 5 and 10 years was 135.3, 159.9 and 121.4 μmol / l. Eight patients had creatinine ² 130 μmol / l at 10 years. Ten patients died from infectious and cardiovascular causes. By comparing the 2 groups ATN + and ATN - we found a statistically significant correlation between ATN and cold ischemia (10 ± 10.9 vs 1.2 ± 4.7 hours, p <0.0001) and the interval between the start of dialysis and transplantation (42.18 ± 38.44 vs. 31.1 ± 25.2 months, p= 0.02). No statistical correlation was found between the ATN and gender, age of recipient and donor, warm ischemia, acute rejection, chronic rejection and graft and patient survival at 1, 5 and 10 years. The ATN is more common among transplanted patients from deceased donors. It had good evolution in the majority of cases and it's correlated to cold ischemia and duration of dialysis. Finally, it has no impact on patients and graft survival.
    La Tunisie médicale 06/2012; 90(6):463-7.
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    ABSTRACT: The dysfunction of the catheter in peritoneal dialysis (PD) is a frequent complication. However, perforation of organs are rare, particularly that of the urinary bladder. This requires an early diagnosis and prompt treatment of patients. We report here the case of a 38-year-old woman having end-stage renal disease due to autosomal-dominant polycystic kidney disease treated by PD since November 2000. Three years later, she was treated for Staphylococcal peritonitis. Four months later, she presented with a severe urge to urinate at the time of the fluid exchanges. The biochemical analysis of the fluid from the bladder showed that it was dialysis fluid. Injection of contrast through the catheter demonstrated the presence of a fistula between the bladder and the peritoneal cavity. She underwent cystoscopic closure of the fistulous tract and the PD catheter was removed. Subsequently, the patient was treated by hemodialysis. One month later, a second catheter was implanted surgically after confirming the closure of the fistula. Ten days later, she presented with pain at the catheter site and along the tunnel, which was found to be swollen along its track. The injection of contrast produced swelling of the subcutaneous tunnel but without extravasation of the dye. PD was withdrawn and the patient was put back on hemodialysis. Bladder fistula is a rare complication in PD and diagnosis should be suspected when patient complains of an urge to pass urine during the exchanges, which can be confirmed by contrast study showing presence of dye in the bladder. PD may be possible after the closure of the fistula, but recurrence may occur.
    Saudi journal of kidney diseases and transplantation: an official publication of the Saudi Center for Organ Transplantation, Saudi Arabia 05/2012; 23(3):552-5.
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    ABSTRACT: The amyloidosis is one of the histologic lesions the most frequently associated to the aging. To identify the several etiologies of amyloidosis in elderly patients according to immunohistochemical type. Retrospective study on 10 years, in Internal medicine and Nephrology department in Charles Nicolle Hospital. Tunis. Tunisia. Diagnosis of amyloidosis was retained after histological confirmation with specific colorations, in patients aged 65 years or more at the diagnose of amyloidosis. The study enrolled 51 patients with amyloidosis. In 67% of cases it was AA amyloidosis. The etiology the most frequently observed with this type was the tuberculosis, followed by chronic pulmonary infections. We retained diagnose of non AA amyloidosis in 21% of patients. The multiple myeloma has been the most frequent etiology observed, but no cause was identified at about half of patients. Twelve per cent of amyloidosis were not typed. From our study, we can remark the high predominance of AA amyloidosis, probably because of frequency of tuberculosis which is still high in our country, this is not in accordance with occidental data, were AL amyloidosis and senile amyloidosis predominate in elderly.
    La Tunisie médicale 01/2012; 90(1):13-8.
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    ABSTRACT: There is a wide interest in epidemiologic studies assessing different causes of post-kidney transplantation rehospitalization. However, there is a paucity of knowledge on the long-term survival and graft function of rehospitalized kidney transplant recipients during the first year. Knowledge of posttransplant rehospitalization causes may help guide the preventive program at the first year. In our study, we assess causes for hospitalization and investigate the long-term patient and graft survival after non-fatal rehospitalization in kidney recipients during the first year. We retrospectively studied the medical histories of 419 kidney transplant recipients whose operations were performed between 1986 and 2009 at Charles Nicolle Hospital, in Tunis, Tunisia. Among these patients, a total of 296 posttransplant rehospitalizations of kidney transplant recipients during the first year occurring in 191 (45.5%) patients were assessed. Clinical characteristics of the patients, including gender, age, reason for kidney failure, weight, height, blood group, length of pretransplant dialysis, immunosuppressive regimen, postoperative complications, the length of hospital stay, transplantation-admission interval, causes of rehospitalizations, graft loss, and mortality rate were reviewed. For donors, these demographics included age, gender, blood group, type of donor (deceased or living), and relationship to the recipient. Because rehospitalizations are possible for more than one cause, the sum of frequencies of rehospitalization causes is more than 100%. There was 1 rehospitalization in 121 patients, 2 rehospitalizations in 47 patients, 3 rehospitalizations in 15 patients, 4 rehospitalizations in 5 patients, 5 rehospitalizations in 2 patients and 6 rehospitalizations in 1 patient. Rehospitalization was more frequent for diabetic patients without significant association. The causes of rehospitalization were infection in 221 cases (55.5%), renal dysfunction in 106 cases (26%), cardiovascular event in 10 cases (2.4%), and diabetic ketoacidosis in 11 cases (2.7%). The length of hospital stay was 22.5 ± 29.6 days, 20.15 ± 22.16 days, 25 ± 30 days and 23.4 ± 27.5 days, respectively, in the first, second, third, and fifth rehospitalizations. Median hospital stay for all rehospitalizations was between 14 and 16 days. The risk factors of rehospitalization were: use of mycophenolate mofetile (P = .0072), use of cyclosporine (P = .0073), and cytomegalovirus infection (P < .001). There was no significant correlation between rehospitalization and either lost of graft and death. During the first year after kidney transplantation, rehospitalization was especially required because of infections and renal dysfunction. The risk factors of rehospitalization were cadaveric graft, use of mycophenolate mofetil, use of cyclosporine, and cytomegalovirus infection. To prevent and minimize rehospitalizations during the first year, a specific preventive program based on infection prevention and graft function monitoring should be established.
    Transplantation Proceedings 06/2011; 43(5):1742-6. · 0.95 Impact Factor
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    ABSTRACT: Malignancies and opportunistic infections are frequently observed after solid-organ transplantation. Their occurrence strongly affects recipient survival. We report the case of a 29-year-old Tunisian kidney-recipient who was diagnosed simultaneously with post-transplant lymphoproliferative disease (PTLD) and visceral leishmaniasis (VL). Withdrawal of immunosuppressive therapy together with antiparasitic treatment using liposomal amphotericin B, and anti-CD20 antibodies medication resulted in cure of leishmaniasis and remission from PTLD. This case is of clinical interest because of the uncommon association of VL with PTLD after solid organ transplantation. It is also original by the favourable outcome of VL and PTLD, both known as life-threatening diseases. Also, it illustrates the predisposing role of immunosuppressive therapy in occurrence of opportunistic infections and malignancies after solid organ transplantation.
    Néphrologie & Thérapeutique 03/2011; 7(6):488-93. · 0.50 Impact Factor
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    ABSTRACT: Malformative uropathies are a frequent cause of end-stage renal disease (ESRD) requiring renal replacement therapy (RRT). Medical management of urinary tract infections and advances in surgical reconstruction procedures resulted in good outcomes of kidney transplantation among these patients. The aim of this article was to describe the epidemiological profiles and outcomes of patients who underwent transplantation for ESRD related to malformative uropathies. Among 493 kidney recipients at our center from 1986 to 2009, 47 had malformative uropathies as the cause of ESRD. We retrospectively studied the incidence of acute rejection episodes, acute tubular necrosis, as well as patient and graft survivals, comparing these results to those observed in patients without malformative uropathies using chi-square tests for qualitative parameters and nonpaired Student t tests for continuous variables. Log-rank tests were used for comparisons of survival curves. The 47 patients, representing 9.53% of our kidney transplant recipients, included 27 men and 20 women (sex ratio=1.35) with an overall mean age of 27.6±9.1 years (range, 10-49). The common etiology was vesico-ureteral reflux (78.7%). Hemodialysis was the main RRT modality (68%) with a median duration of 41 months. Also, 82.9% of patients received transplants from living donors. Acute tubular necrosis occurred in 4 of these (8.5%) versus 22.06% of the other patients (P=.03). Acute rejection episodes were observed in 13 of these patients (27.6%) versus 23.1% of the other patients (P=not significant [NS]). After a cumulative follow-up period of 3744 months (median, 41.8 months), 5 patients had died (1.6 death/y/100 patients) and 5 had lost their allografts and returned to dialysis (1.6 case/y/100 patients). Graft survival rates at 1, 5, and 10 years were 97.8%, 93.2%, and 79.9%, which were comparable with 95.9%, 87.6%, and 78.9% among the other patients, respectively (P=NS). Patient survival rates at 1, 5, and 10 years were 100%, 88.5%, and 82.6% versus 96%, 87.6%, and 79.6%, respectively (P=NS). Kidney transplantation in patients with malformative uropathies is increasingly frequent. The incidence of acute rejection episodes as well as patient and graft survivals were comparable with those of subjects without malformative uropathies.
    Transplantation Proceedings 03/2011; 43(2):437-40. · 0.95 Impact Factor
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    ABSTRACT: Posttransplant diabetes mellitus (PTDM) is a common, serious complication of renal transplantation. The aim of this retrospective study was to estimate the incidence and to identify potential factors predisposing to PTDM. We evaluated 296 adult nondiabetic patients who underwent kidney transplantation at our center. PTDM was defined according to 2003 international consensus guidelines. Potential factors predisposing to PTDM were analyzed individually and simultaneously using a logistic regression model. Over 2054.5 years of cumulative follow-up, 51 patients (17.2%) developed diabetes corresponding to an annual incidence of 2.5%. PTDM was diagnosed after a median of 2.9 months (range: 0.2-168). The mean age of affect individuals was 33.3±7.4 years. Patients with PTDM were significantly older (P<.0005) and showed an higher body mass index (BMI; P<.004). Univariate analysis revealed that age, BMI, family history of diabetes, vascular nephropathy, and hepatitis C infection were associated with PTDM. Multivariate analysis rescaled the roles of age (relative risk [RR]=1.046/y; P<.04), BMI (RR=1.107/kg/m2, P<.05), vascular nephropathy (RR=7.06, P<.03), and hepatitis C infection (RR=2.72, P<.03) as independent factors predisposing to PTDM. Among our relatively young kidney transplant recipients, in whom only 8% received tacrolimus, PTDM was a frequent complication. We suggest that the use of oral glucose tolerance tests to screen patients identifies those predisposed to develop this complication.
    Transplantation Proceedings 03/2011; 43(2):568-71. · 0.95 Impact Factor
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    ABSTRACT: TINU syndrome is a rare entity known Dobrin disease, combining uveitis mostly bilateral and recurrent with acute tubulo interstitial nephritis (AIN) occurring in young adults. The etiology and pathogenesis of this syndrome remain unknown. To report a new case of TINU syndrome and to discuss its etiopathogenesis. This 33 year old women is hospitalized for exploration of acute renal failure, in a context of deterioration of general condition, associated with a unilateral anterior uveitis. The bronchoalveolar lavage showed lymphoid interstitial alveolitis with CD4 and the renal biopsy found lesions characteristic of AIN. Evolution under corticoïd treatment was favorable. Lymphoid interstitial alveolitis associated with TINU syndrome has been reported only twice before. The discovery of a TINU syndrome must practice bronchoalveolar lavage in search of sub clinical pulmonary involvement.
    La Tunisie médicale 02/2011; 89(2):210-2.
  • Nephrologie & Therapeutique - NEPHROL THER. 01/2011; 7(5):442-442.
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    ABSTRACT: Infections following renal transplantation in children are a major cause of severe morbidity and mortality. Surgery is complex and performed in a subject whose immunological mechanisms are impaired by end stage renal failure and immunosuppressive drugs. To evaluate the incidence and the risk factors of early infectious following renal transplantation in children. Methods: Infectious complications were retrospectively monitored in 37 children receiving renal transplantation at our center from 1992 to 2008. Infectious complications identified were dominated by urinary tract infections occurred in 12 patients. The clinical symptomatology is dominated by fever and decrease in health. In 4 patients the urinary infection was asymptomatic. Three patients had pneumonia; the diagnosis was suspected clinically and confirmed by the chest radiography. Three other patients developed sepsis. In one of them, the etiology was a peritonitis related to dialysis catheter. Two transplant showed a herpetic cheilitis and one patient developed a parvovirus infection that evolved well after two transfusions. In all cases, the outcome was favourable with no deaths or impact on graft function. After renal transplantation, the disturbance of inflammatory reactions explains the often latent or delayed infectious process making early diagnosis difficult. It is imperative to monitor infectious to minimize morbidity and mortality.
    La Tunisie médicale 01/2011; 89(1):26-30.
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    ABSTRACT: 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.
    Transplantation Proceedings 12/2010; 42(10):4311-3. · 0.95 Impact Factor
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    ABSTRACT: The introduction of mycophenolate mofetil has proven itself effective in preventing acute rejection in renal transplant recipients. However, this cost is ineffective with countries with a limited income. This study sought to compare the clinical and therapeutic profiles of a generic formulation with mycophenolate mofetil. This 2-year, single-center, prospective, randomized, open-label study investigated the efficacy and safety of a new mycophenolate mofetil generic formulation compared with mycophenolate renal transplant recipients. The study divided patients in 2 groups: 8 patients in G1 received mycophenolate mofetil 500 and 10 patients in G2 received mycophenolate. Their demographics were similar: mean age, 36.6±7.1 and 33.3±11.7 years; sex M/F: 2/6 and 5/5; mean donor age, 42.6±11.1 and 43.6±13.9 years; mean HLA mismatches, 2.7±1.2 and 3.3±1.5; deceased donors, 25% and 20%; and warm ischemia time, 40.2±11.9 and 38.7±10.5 minutes. All patients received 2 g daily of mycophenolate mofetil 500 or mycophenolate with initial dosage of 0.1 mg/kg/d and prednisolone. One patient of 7 in the mycophenolate mofetil group and 4 of 6 in the mycophenolate group had 1 episode of acute tubular necrosis, and 1 patient in each group had an acute rejection with no significant differences between the groups. The area under the curve of the mycophenolate mofetil did not show any difference between the 2 groups. The values of serum creatinine were also comparable. Patient survival rate at 6, 12, and 24 months was 100% in the groups. The frequencies of digestive and hematologic adverse effects were comparable in the groups with no significant differences. Use of mycophenolate mofetil 500 provided safe and effective immunosuppressive therapy compared with mycophenolate. However, as the duration of the study was short, these results need to be confirmed in a long-term study.
    Experimental and clinical transplantation : official journal of the Middle East Society for Organ Transplantation. 12/2010; 8(4):292-6.
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    ABSTRACT: Abnormal thyroid hormone production and metabolism are relatively common in chronic renal failure and in regular haemodialysis. Graves' disease is a very unusual condition and is difficult to identify. We report a case of Graves' disease in a patient on regular hemodialysis. A 26-year-old man undergoing regular hemodialysis from unknown chronic nephropathy since four years. The patient suffered from unexplained slimming and aggressiveness. On admission, he had an irritability, tremor of the extremities, arterial hypertension not controlled by the medical treatment, discrete asynergy oculo-palpebral, glare of the glance and protrusion of the ocular spheres. The thyroid was non palpable. Biological tests demonstrated hyperthyroidism. Thyroid-stimulating hormone receptor antibodies were positive. Thyroid echography and scintiscanning showed vascular and hyperfonctionnel character of the thyroid. The patient was treated radically by radioactive iodine 131 therapy after medical preparation by antithyroid agent. He developed hypothyroidism treated by substitutive treatment. The diagnosis of Graves' disease must be evoked even in the absence of specific symptoms in haemodialysis patients. In front of clinical symptoms, since the conventional treatment is effective and inoffensive.
    Néphrologie & Thérapeutique 07/2010; 6(4):251-4. · 0.50 Impact Factor
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    ABSTRACT: Renal involvement in the Behcet's disease is rare. The clinical features vary from urinary sediment's abnormalities to ESRD. We propose to study the clinical, biological and histological data, the therapeutic management and the prognosis of patients. We report a retrospective study including 8 patients representing 1.23 % of cases. The average age of the patient was of 37 +/- 12. 35 years with a clear male prevalence. Urinary signs were discovered fortuitously by the strips in the majority of the cases after an average of 18 months. It's about proteinuria and hematuria. Renal insufficiency and hypertension were rare. Pathological study highlighted 3 cases of amyloidosis, 2 cases of IgA nephropathy, 1 case of minimal change disease, 1 case of endo and extracapillary glomerulonephritis and 1 case of interstitial nephropathy. Patients having GN were treated by corticoids and immunosuppressive agents and those having an interstitial nephropathy were treated symptomatically with good evolution in the majority of the cases. Only one patient is dead, he had amyloidosis. Prognosis depended on the precocity of the diagnosis, the histological type and the treatment. The renal involvement during Behçet's disease is rare. Amyloidosis and Ig A nephropathy are the most frequent. Treatment is still controversial.
    La Tunisie médicale 06/2010; 88(6):404-8.
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    ABSTRACT: Gastrointestinal angiodysplasia is a very common cause of digestive haemorrhage among patients with chronic renal insufficiency. It is well known that bleeding from angiodysplasias can be a difficult therapeutic problem since therapeutic possibilities are scarce and surgery is scolded with high mortality rate. Endoscopic argon plasma ablation therapy is a new, effective and safe treatment in the management of gastrointestinal angiodysplasia. We reported a case of a female haemodialysis patient aged 40 years. She was haemodialysed since 6 years in our center from unknown nephropathy. In March 2006, she complained of black stools and melena, and developed severe anaemia (Haemoglobin at 4 g/dL). Exploratory endoscope examination of the digestive tract showed the presence of bleeding from angiodysplastic lesions of the right colon. The patient had severe clinical picture extension of angiodysplastic lesions and frequent bleeding episodes. Bleeding arrest was observed after argon plasma coagulation, with a significant decrease of blood transfusions and improvement of anaemia. Gastrointestinal angiodysplasia was reported to be an important complication in dialysis patients and was recognized as an important cause of erythropoietin-resistant anaemia. It can worsen vital prognosis. Argon plasma coagulation is an effective treatment in these patients.
    Néphrologie & Thérapeutique 04/2010; 6(4):248-50. · 0.50 Impact Factor
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    ABSTRACT: Nephrolithiasis still remains a too frequent and underappreciated cause of end stage renal disease (ESRD). 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. 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 patient's 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. 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.
    International Journal of Nephrology and Renovascular Disease 01/2010; 3:21-6.
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    ABSTRACT: The dissecting aortic aneurysm (DAA) is a rare pathology that may result in fatal outcome. We report follow up of three cases of DAA patients undergoing maintenance hemo-dialysis who were managed conservatively.
    Saudi journal of kidney diseases and transplantation: an official publication of the Saudi Center for Organ Transplantation, Saudi Arabia 11/2009; 20(6):1053-6.