Acute renal failure in pregnancy associated with solitary kidney, congenital ureteropelvic junction obstruction, and renal cortical cyst.

We have described a patient with acute renal insufficiency during pregnancy related to unilateral renal agenesis and congenital obstruction of the ureteropelvic junction. Optimism for a good outcome in both the mother and fetus seems justified if therapeutic measures in such cases can maintain renal homeostasis.