[A case of hemangioma at the left renal papilla of the calix with anemia and gross hematuria].

An 18-year-old man was admitted to our hospital due to gross hematuria and proteinuria after a marathon race. Contrast-enhanced CT showed no remarkable findings. His gross hematuria and proteinuria disappeared with- out treatment. One year later, he was admitted to our hospital due to reburrent gross hematuria and anemia (serum hemoglobin level of 8.0 g/dL). Both contrast-enhanced CT and renal arteriography revealed no remarkable find- ings; however, cystoscopy showed that his hematuria came from the left ureteral orifice. Ureteroscopy revealed hemorrhage from a large hemangioma at the left renal papilla of the calix. He presented with intermittent gross hematuria, proteinuria, and hypocomplimentemia, suggesting the possibility of glomerulonephritis. His gross hematuria and proteinuria improved after laser coagulation was performed.