مقال بحثي وصول مفتوح Retrocaval Ureter Causing Obstructive Hydronephrosis in a Pediatric Patient Managed with Minimal Invasive Surgery: A Case Report Khulood Al-Hinai, Yousuf Al-Shaqsi, Bashar Ahmed وآخرون · مجلة عُمان الطبية · 2026