RESUMO
Pelvi-ureteric junction obstruction (PUJO) is not a rare clinical entity. It is indeed one of the common urological conditions presenting most commonly with hydronephrosis and pain. The most common etiology for patients suffering from acquired PUJO is the presence of calculus/calculi. An aberrant renal vessel (now termed as a vascular bar) is one of the causes in adults which are often missed on pre-operative investigations and is detected intraoperatively. We present herein the case of a 28 years old female who came with complaints of loin pain for 2 – 3 months. The workup investigations revealed only hydronephrosis without any calculi. Thus, a diagnosis of the primary PUJO was made. The patient was successfully managed by a laparoscopic pyeloplasty.