L’adénome métanéphrique bilatéral du rein

L’adénome métanéphrique du rein est une tumeur épithéliale bénigne rare. Son diagnostic est exclusivement histologique. Le diagnostic différentiel se fait essentiellement avec le néphroblastome et le carcinome papillaire à cellules rénales. L’étude cytogénétique apporte des éléments importants pour différencier entre ces trois entités histologiques. L’adénome métanéphrique bilatéral est exceptionnel (pour autant que nous sachions un seul cas a été rapporté dans la littérature) et pose un problème de diagnostic différentiel avec le cancer rénal bilatéral. Nous rapportons une nouvelle observation de cette affection rare chez un patient âgé de 64 ans

Case Report: Renal Artery Aneurysm Presenting with Hematuria

Renal artery aneurysm is a relatively uncommon form of renovascular disease. Early diagnosis by appropriate imaging is essential in order to avoid emergency nephrectomy for rupture. We report a 78 year old man who presented with gross hematuria. Doppler ultrasound and CT showed aneurysm of the right renal artery. Because of hemodynamic instability, right nephrectomy was performed with a good outcome.Key Words: Renal artery, aneurysm, treatmen

Pseudotumoral Malacoplakia of the Bladder

Malacoplakia is a rare inflammatory condition most often affecting the genitourinary system. We report the case of a 24-year-old man who presented with gross hematuria, nocturia, frequency, dysuria and considerable weight loss during the preceding three months. Digital rectal examinationshowed a solid pelvic mass. Ultrasonography and computed tomography showed calyceal dilatation on the right side and a solid bladder mass 10 cm in diameter suspicious of bladder cancer. Transurethral resection of the tumor was incomplete, due to the large volume of the bladder mass. Histological examination of the resected specimen revealed malacoplakia of the bladder. The patient was treated with fluoroquinolone and vitamin C. Follow-up at 3 months showed marked regression of the bladder mass and complete resolution of the calyceal dilatation

Management of encrusted ureteral stents

Objectives: To present our experience in managing encrusted ureteral stents and to review the literature on the subject.Methods: A total of 22 patients with encrusted ureteral stent were treated in our department. Encrustation of the stent and associated stone burden were evaluated using plain radiography, sometimes supplemented by intravenous urography or ultrasonography. The treatment method was determined by the site of encrustation, the size of the stone burden and the availability of endourologic equipment.Results: Stents were inserted for stone disease in 17 patients, for congenital abnormality in 3 and for ureteric obstruction by malignancy in 2. Stents were left in place for a mean of 10.8 months (range 5–34 months). The site of encrustation was in the bladder in 15 (68.2%), ureter in 13 (59%) and kidney in 8 patients (36.4%); more than one site was involved in 11 (50%) cases. For upper coil encrustations, retrograde ureterorenoscopy was performed in 9 cases, percutaneous nephrolithotomy in 4 and open pyelolithotomy in 2. For lower coil encrustation, fragmentation by grasper and/or transurethral cystolithotripsy was attempted in 11 cases, and suprapubic cystolithotomy was required for failure in 7 cases. Sixteen patients (72.7%) were rendered stone-free and 5 (22.7%) had clinically insignificant residual stones (3mm or less).Conclusions: Encrustation is one of the most difficult complications of ureteral stents and its management is a complex clinical scenario for the treating surgeon. The combination of several surgical techniques is often necessary but the best treatment remains the prevention of this problem by providing patient education

Expulsion of cadmium from a simulated wastewater using CKD as adsorbent: Optimization with isotherm study

Cement kiln dust (CKD) considers as an inexpensive, abundant adsorbent and was used in the present work for removing cadmium ions from a simulated wastewater. CKD was obtained from Al-Duh Cement Factory located in south of Al-Muthanna Governorate/Iraq and identified by X-ray diffractometer (XRD), scanning electron microscopy (SEM) with EDX, and Fourier transform infrared spectrometry (FTIR). Optimization of the main effective parameters like initial cadmium concentration, CKD dosage, shaking speed, pH and contact time on the cadmium removal efficiency was achieved via applying reaction surface strategy (RSM). Results showed that underlying cadmium fixation has the fundamental impact on the cadmium removal efficiency followed by CKD dosage, time, pH, and lastly shaking speed. The preferred operating conditions were found to be an initial Cd concentration of 20 ppm, CKD dosage of 35 g \ L, pH of 8, shaking speed of 300 rpm, and contact time of 90 minutes. Based on these optimum conditions, 99.75% removal efficiency of cadmium was obtained. The adsorption isotherm results showed that the adsorption behavior of Cd ions on CKD agree well with Langmuir model. CKD seems to be a systematic, sustainable and economic material for cadmium removal from wastewater

Zinc (II) removal from simulated wastewater by electro-membrane extraction approach: Adopting an electrolysis cell with a flat sheet supported liquid membrane

The aim of this study is to utilize the electromembrane extraction (EME) system as a manner for effective removal of zinc from aqueous solutions. A novel and distinctive electrochemical cell design was adopted consisting of two glass chambers, a supported liquid membrane (SLM) housing a polypropylene flat membrane infused with 1-octanol and a carrier. Two electrodes were used, a graphite as anode and a stainless steel as cathode. A comprehensive examination of several influential factors including the choice of carrier, the applied voltage magnitude, the initial pH of the donor solution, and the initial concentration of zinc was performed, all in a concerted effort to ascertain their respective impacts on the efficiency of zinc elimination. Two distinct carriers, namely tris(2-ethylhexyl) phosphate (TEHP) and bis(2-ethylhexyl) phosphate (DEHP) were evaluated, in a tandem with utilization of 1-octanol. The results revealed essential role played by the applied voltage in augmenting the rate of mass transfer of zinc across the membrane. The best operating conditions were utilized for 1-octanol enriched with 1.0 vol.% bis(2-ethylhexyl) phosphate as a carrier, applied voltage of 60 V, initial pH of 5, initial zinc concentration of 15 mg L-1, extraction duration of 6 hours, and stirring rate of 1000 rpm. Surprisingly, operating under these meticulously devised conditions culminated in the outstanding removal efficiency of 87.3 %. In comparison with no applied voltage, a substantial enhancement in removal efficiency was observed, trans­cending from a meager 36.67 % to an impressive 87.3 % at 60 V, suggesting thus a tremen­dous potential of EME as an efficacious technique for the elimination of heavy metals

Predictive Modeling of Surface Roughness Of Centered And Un-Centered Workpiece Lengths In Turning Operation

The attempt of the present study has addressed an area that has been relativelyneglected in the past researches. This area focuses on studying and analysis the effectof different centered and un-centered workpiece lengths, using turning machinetailstock, on the products surface roughness, and then collecting data to generate anexperimental charts and equations for the prediction modeling of surface roughnessand increasing productivity for many turned products. These charts and equationscould be serving as a quick indication for manufacturers to avoid pre-chatter conditionsand the trial and error methods, and consequently reduce the required experience inthis field. So, the applicable range of workpiece lengths can be safely extended from10 mm to 60 mm bars with 10 mm in diameter, and from 10 to 75 mm bars with 20mm in diameter. This range could be increasing as bar diameter increasing and viseversa

Kinetic Modeling of Electromembrane Extraction of Copper using a Novel Electrolytic Cell Provided with a Supported Liquid Membrane

   The aim of this study is to investigate the kinetics of copper removal from aqueous solutions using an electromembrane extraction (EME) system. To achieve this, a unique electrochemical cell design was adopted comprising two glass chambers, a supported liquid membrane (SLM), a graphite anode, and a stainless-steel cathode. The SLM consisted of a polypropylene flat membrane infused with 1-octanol as a solvent and bis(2-ethylhexyl) phosphate (DEHP) as a carrier. The impact of various factors on the kinetics constant rate was outlined, including the applied voltage, initial pH of the donor phase solution, and initial copper concentration. The results demonstrated a significant influence of the applied voltage on enhancing the rate of copper mass transfer across the membrane. As the applied voltage increased, the rate constant also increased. Additionally, increasing the pH of the solution led to an initial elevate in the rate constant, reaching a maximum value at pH 5, after which it started to decline. Moreover, higher initial copper concentrations had an adverse effect on the rate constant. Notably, the concentration decay profiles observed under different operating conditions followed first-order kinetics, with correlation coefficients exceeding 0.99. The elucidation of this discovery emanated from a remarkable and striking congruence between the experimental data and the mathematical underpinnings of the first-order kinetics model. This serendipitous alignment profoundly reinforced the robustness, veracity, and unwavering reliability of meticulously obtained results, amplifying the credibility and trustworthiness of the present comprehensive study

Factors influencing eating behavior of Benghazi University students

Background: University students are more exposed to new individual and environmental influences. This transition period is considered as a risky life phase because it’s characterized by changing in physical and social status as well as changing in the lifestyle that will affect the eating behavior of students. Aims and Objectives: The current study aimed to determine the factors influencing the eating behaviors of Benghazi University students. Materials and Methods: A cross sectional study was undertaken for a period from January to May 2019 in Benghazi University. Samples of 300 students were requested to fill out a questionnaire. SPSS was used to analyze the data. Results: After starting university, (64%) of students stated that they had a change in eating behavior and (59%) of participants reported unhealthy eating pattern. About (67%) of students had a sedentary lifestyle with the majority of them were having unhealthy eating patterns (P value = 0.000). According to the BMI the majority of students had normal weight (62.6%). About (80%) of student reported that the lack of time to prepare a healthy meal during study period was effective and More than half of the students reported that inaccessibility of healthy food, student’s positive emotions, poor knowledge of healthy food, and stress associated with exams period were effective. There was a statistical difference between student’s eating patterns and poor knowledge, lack of time, stress, body weight concerns, negative emotions, peer pressure, lack of parental control, mass media and social life (P value < 0.05). Conclusion: This study concluded that the majority of students undergo a negative shift in their eating and lifestyle after starting university, and there is statistical difference between many factors and student’s eating pattern

Synchronous Primary Tumors of the Kidney and Pancreas: Case Report

The simultaneous presence of primary carcinomas in the same patient is uncommon and synchronous primary tumors involving the kidney and pancreas are extremely rare. There are a few reports in the English literature of synchronous primary malignancies of the kidney and pancreas. We present a 62-year-old man who had weight loss of 9 kg and epigastric pain. Findings showed a Furhman grade II renal papillary carcinoma confined to the kidney and a synchronous well differentiated pancreatic ductal adenocarcinoma.Key Words: Synchronous double cancer, renal cell carcinoma, pancreatic carcinom