Background. Despite the key role played by physician-investigators in bridging basic and clinical sciences, their number has declined significantly in the last decades especially in developing countries. Thus, we aimed to investigate attitudes and perceived barriers towards participation in clinical research among medical students in an Egyptian medical school. Methods. We employed a cross-sectional design, in which 420 students from the Faculty of Medicine, Ain Shams University completed a self-administrated questionnaire to assess their attitudes, perceived barriers, and knowledge about clinical research. The results were analyzed considering the students’ gender, year of enrollment, and high school background. Results. Seventy medical students from each year of enrollment participated in the study. The majority of students (74.2%) agree that undergraduates should participate in clinical research. However, only 23.8% reported engagement in related activities. Students showed low knowledge scores of 1.9±0.3 on a scale of six questions. They highlighted several barriers against research participation including lack of time, proper mentoring, and funding. Conclusion. Although the majority of students showed positive attitudes towards clinical research, they reported low participation in related activities, associated with low knowledge scores. Several barriers should be addressed as lack of time, funding, and proper mentoring.

Objective To report the operative management , intra and post operative complications and subsequent stone-free rates of patients with urolithiasis in a horseshoe kidneys. Materials and Methods We retrospectively reviewed all patients presenting to our centre with a horseshoe kidney and urolithiasis over a 20-year period. The stone burden, surgical management, complications and stone clearance rates were recorded. Results In all, 80 patients with urolithiasis in horseshoe kidney were treated. Percutaneous nephrolithotomy (PCNL) was used in 28 patients. 12 patients had laparoscopic assisted PCNL , 8 had flexible ureteroscopy and 18 had laparoscopic pyelolithotomy . PCNL was used for large stones = (mean digitized surface area= 614.32 mm 2 ) and required one to four stages to achieve an overall stone clearance rate of 88%. Stones were cleared at one sitting in 77% of PCNL procedures. only 33% of patients treated with flexible ureteroscopy was cleared from stones in one session and surprisingly, 89% of patients treated with laparoscopic pyelolithotomy was stone free after one session Complications were minimal, with 15% minor and 3% major complications in the PCNL group only.. Conclusions Appropriate management of urolithiasis within the horseshoe kidney depends not only on stone burden, but also on stone location, calyceal configuration and malrotation. Stones can be cleared successfully in almost all patients providing that all techniques are available to the operating surgeon.

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