[en] Long-term immunosuppressive therapy after renal transplantation increases the risk of developing malignancy. The aim of this study was to determine the demographic parameters and immunosupression protocol in kidney transplant recipients with and without malignancy. This case-control study was undertaken on 12 renal transplant recipients with malignancy and 48 without malignancy at The Shahid Beheshti Kidney Transplantation Center in Babol (north of Iran). Data including age, gender, number of anti-rejection therapies and immunosupression regimen were recorded and analyzed with SPSS and Mann-Whitney Fisher's exact t-test. P value < 0.05 was considered significant. The prevalence of malignancy in 380 renal allograft recipients was 3.15% during six years of follow-up. The malignancies noted after renal transplantation included: Kaposi's sarcoma (n = 5), lymphoma (n = 3), cutaneous basal cell carcinoma (n = 2), cutaneous squamous cell carcinoma (n = 1) and brain tumor (n = 1). Age of patients at the time of transplantation, duration of immunosupression treatment and number of anti-rejection therapies were not significantly different in patients with and without malignancy (P > 0.05). Males were signi-ficantly more affected with malignancy compared to females (P < 0.05). Our study shows that there was no significant correlation between age at transplantation, duration of immunosupression treatment and number of anti-rejection therapies and occurrence of post-renal transplantation malignancy; however, the prevalence of malignancy was significantly higher in male patients. The most common malignancy seen was Kaposi's sarcoma followed by lymphoma (Author).

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[en] Although percutaneous transluminal renal angioplasty (PTRA) is associated with excellent results in medial fibromuscular dysplasia (FMD), the clinical and technical outcome in the less common nonmedial subtype of FMD is not clearly known. Angiographic PTRA results and clinical follow-up were documented, to report technical and clinical results in 30 patients with unifocal, nonmedial dysplastic stenoses. Balloon angioplasty was technically successful in only 65% of the lesions. Additional stenting, performed after PTRA failure in six patients, increased the initial technical success rate to 82%. Stenting was used in another lesion after restenosis, and long-term patency was achieved in only three of the seven stented lesions. Frequent restenoses and unusual complications were observed during follow-up. Stent fracture occurred in two cases. Overall, long-term clinical and technical successes were sustained in 70 and 76%, respectively. We conclude that nonmedial, unifocal renal artery dysplastic stenoses do not share the excellent prognosis of the medial type and that stenting should be avoided. Therefore, surgery should be considered in lesions remaining unresponsive to balloon dilatation, after a second PTRA attempt.

[en] To assess the effect of aqueous extract of Carum carvi seeds in experimentally induced diabetic nephropathy (DN) in rodents, we studied 48 adult male Wistar rats divided into 4 groups: normal controls (group A), diabetes positive control (group B), and experimental (groups C and D). They received Carum carvi extract as a renoprotective agent. Rats having fasting blood glucose levels over 280 mg/dL were included in this study. Group C rats received STZ (60 mg/kg) and aqueous extract of Carum carvi at 30 mg/kg of body weights. On the other hand group D rats received STZ (60 mg/kg) and aqueous extract of Carum carvi at 60 mg/kg of body weight. Blood samples were collected on the 60 th day, and kidneys were also extracted for examination. The diabetic group rats showed a variable increase in the serum levels of glucose, urea, creatinine, total urinary protein and microalbuminuric levels. Body weight decreased and urine volume increased in the diabetic groups. 30 mg/kg body weight of Carum carvi dose decreased the levels of these parameters in rats. On the other hand, 60 mg/kg body weight of Carum carvi dose significantly decreased the levels of the biochemical parameters. The morphological examination of group C rats showed no changes whereas the rats in group D showed moderate changes. Carum carvi constituents, especially flavonoids and carvone have strong anti-oxidant activity, which provides reno-protection against diabetes and its complications. In conclusion, high dose of Carum carvi aqueous seeds extract (60 mg/kg) showed reno-protection against STZ induced diabetic nephropathy in rats (Author).

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[en] Percutaneous transluminal angioplasty has been successfully used for the treatment of transplant renal artery stenosis (RAS). Cutting-balloon angioplasty (CBA) is being used as a second option in pressure-resistant stenosis. It is thought that CBA is less traumatic and therefore restenosis occurs less frequently than in conventional angioplasty. This case report describes the unusual use of a cutting balloon in transplant RAS as a first option in the early postoperative period. Long-term follow-up data are also presented.

[en] We report a unique anomalous renal venous drainage on a 25-year-old man who had congenital absence of the right renal vein and an aberrant venous drainage through the lower pole of the kidney into the inferior vena cava. To our knowledge, this anomaly has not been previously reported in the peer-reviewed literature. State-of-the-art imaging findings are presented.

[en] Cornelia de Lange syndrome is the prototype for cohesinopathy disorders, which are characterized by defects in chromosome segregation. Kidney malformations, including nephrogenic rests, are common in Cornelia de Lange syndrome. Only one post-mortem case report has described an association between Wilms tumor and Cornelia de Lange syndrome. Here, we describe the first case of a living child with both diseases. Non-anaplastic triphasic nephroblastoma was diagnosed in a patient carrying a not yet reported mutation in NIPBL (c.4920 G > A). The patient had the typical facial appearance and intellectual disability associated with Cornelia de Lange syndrome in absence of limb involvement. The child’s kidneys were examined by ultrasound at 2 years of age to exclude kidney abnormalities associated with the syndrome. She underwent pre-operative chemotherapy and nephrectomy. Seven months later she was healthy and without residual detectable disease. The previous report of such co-occurrence, together with our report and previous reports of nephrogenic rests, led us to wonder if there may be any causal relationship between these two rare entities. The wingless/integrated (Wnt) pathway, which is implicated in kidney development, is constitutively activated in approximately 15–20 % of all non-anaplastic Wilms tumors. Interestingly, the Wnt pathway was recently found to be perturbed in a zebrafish model of Cornelia de Lange syndrome. Mutations in cohesin complex genes and regulators have also been identified in several types of cancers. On the other hand, there is no clear evidence of an increased risk of cancer in Cornelia de Lange syndrome, and no other similar cases have been published since the fist one reported by Cohen, and this prompts to think Wilms tumor and Cornelia de Lange syndrome occurred together in our patient by chance