Renal hypertension secondary to ureteropelvis junction obstruction. Unusual presentation and new therapeutic modality.

We recently have treated an infant with a ureteropelvic junction obstruction believed to be the first reported case of nonrenovascular renal hypertension presenting as a cerebrovascular accident. A new role for the percutaneous nephrostomy as a predictive, diagnostic, and therapeutic tool is illustrated. Pitfalls in the preoperative assessment of ureteropelvic junction obstructions are discussed, and possible mechanisms for reno-prival hypertension are suggested.