A case of hydronephrosis associated with renal hemorrhage

In a 10-year-old boy showed macroscopic hematuria after a bruise in the abdominal region and , hydronephrosis associated with subcapsular hemorrhage in the kidney developed. Abdominal CT scan demonstrated a hot area apprearing as a hemorrhagic focus in the subcapsular region of the left kidney. This finding was no longer observed on day 6 when hematuria was detected only by microscopy. Contrast enhancement revealed a markedly dilated renal pelvic and a mirror-surface formation of the contrast medium. (Chiba, N.)