Sonography of the Page kidney

We used sonography to investigate 3 patients with hypertension owing to a Page kidney phenomenon. In 2 cases a perinephric cystic collection was compressing the kidney, while in 1 case there was a large perinephric organized hematoma. When a Page kidney is suspected in a hypertensive patient sonography is a reasonable next step in the evaluation, after the excretory urogram, and may obviate the need for angiography.