An 8-year-old boy was referred to Pusan National University Yangsan Hospital with left ureteropelvic junction (UPJ) obstruction. He had experienced episodes of intermittent gross hematuria that had first presented at the age of 5 years. He was otherwise healthy and had no previous medical problems. He had no history of urinary tract infections or stones. A physical examination showed no left fl...

OBJECTIVE The goal of this study is to evaluate some structural changes in muscular, collagenous and neural components as well as expression of Cajal-like cells and apoptosis of smooth muscle cells in congenital ureteropelvic junction obstruction (UPJO). METHODS Tissue specimens were obtained from 25 patients with UPJO and compared with normal ureteropelvic junction regions of 19 autopsies. I...

OBJECTIVES To assess retrospectively the subjective and objective outcomes achieved after laparoscopic treatment for ureteropelvic junction obstruction at our institutions. METHODS Between August 1999 and July 2001, 19 patients (11 women and 8 men), with a mean age of 31.2 years (range 17 to 67), underwent laparoscopic treatment for ureteropelvic junction obstruction. Of these, 17 patients we...

INTRODUCTION The treatment of ureteropelvic junction has evolved considerably over the past 20 years, resulting in new surgical techniques, but traditional open surgery remains the gold standard treatment. Currently, less invasive techniques are used for the treatment of ureteropelvic junction obstruction. The purpose of our study is to compare the surgical and functional results between laparo...

INTRODUCTION Ureteropelvic junction obstruction and concomitant calculus disease may coexist. We demonstrate our use of flexible renoscopy during laparoscopic pyeloplasty for caliceal stone removal. PATIENT AND METHODS A 28-year-old female patient presented with recurrent attacks of flank pain of two years duration. When noncontrast-CT and DTPA were performed, the patient was diagnosed with u...

Ureteropelvic junction UPJ obstruction is caused by the presence of an aperistaltic dysplastic segment at the UPJ. Besides this intrinsic etiology, extrinsic factors, mainly crossing vessels, maybe the causative factor. The controversy regarding the functional significance of vessels crossing at the UPJ is not a new one, though this debate has been resurrected in recent years because of improve...

Ureteral obstruction (ureteropelvic or ureterovesical junction obstruction) is frequently diagnosed during the workup investigation of an asymptomatic infant child with upper urinary tract dilatation, commonly identified in a prenatal ultrasound. In older children, recurrent lumbar pain red flag for ureteral obstruction. Although less frequent, hypertension may be initial and only manifestation...

BACKGROUND In animal studies, the inhibition of VEGF activity results in high mortality and impaired renal and glomerular development. Mechanical stimuli, like mechanical stretch in respiratory and circulatory systems, results in an elevated expression of VEGF. In animal models, the experimental urinary obstruction is associated with stretching of tubular cells and activations of the renin-angi...

In cases with incomplete ureteric duplication, lower pole ureteropelvic junction obstruction (UPJO) may occur as an unusual entity. Surgical reconstruction of UPJO can be with different techniques such as pyeloplasty, pyeloureterostomy or ureteroureterostomy. In our case, the connecting segment distal to the pelvioureteric junction was found short and we performed direct pyeloureteral side-to-s...