OBJECTIVE The purpose of this study was to evaluate split renal function, estimate single-kidney renal function, and identify cause of obstruction in patients with ureteropelvic junction (UPJ) obstruction by using contrast-enhanced dynamic MR renography (MRR). MATERIALS AND METHODS Seventeen patients with UPJ obstruction underwent MRR and diuresis nuclear renography. Nuclear renography assess...

To assess the value of a continuous marker in predicting the risk of a disease, a graphical tool called the predictiveness curve has been proposed. It characterizes the marker's predictiveness, or capacity to risk stratify the population by displaying the distribution of risk endowed by the marker. Methods for making inference about the curve and for comparing curves in a general population hav...

Consider a set of baseline predictors X to predict a binary outcome D and let Y be a novel marker or predictor. This paper is concerned with evaluating the performance of the augmented risk model P(D = 1|Y,X) compared with the baseline model P(D = 1|X). The diagnostic likelihood ratio, DLR(X)(y), quantifies the change in risk obtained with knowledge of Y = y for a subject with baseline risk fac...

Implication for health policy/practice/research/medical education: This article discusses renal artery thrombosis as a complication of distal renal artery stenosis in a kidney transplant recipient. This important complication should be considered in the differential diagnosis of acute kidney injury occurring immediately post-kidney transplantation. Acute early transplant renal artery thrombosis...

Obstructive nephropathy is a term describing the damage to the renal parenchyma that results from the obstruction to the flow of urine anywhere along the urinary system. Long term obstruction causes chronic renal disease. Obstruction coexisting with infection and impaired renal function, when complicated by elevated temperature and leukocytosis that can lead to septic shock, are an absolute ind...