1. Hinman, F. Jr.: Peripelvic extravasation during intravenous urography. Evidence for an additional route for backflow after ureteral obstruction.J. Urol., 85, 385 (1961).
2. Kiil, F.: The function of the ureter and pelvis. W. B. Saunders Co., Philadelphia 1957.
3. Schwartz, A., Caine, M., Hermann, G., Bittermann, W.: Spontaneous renal extravasation during intravenous urography.A. J. R., 98, 27 (1966).
4. Kinoshita, N., Yamasaki, Y., Kato, M., Nishi, M., Arima, K., Hayashi, N., Hori, N., Hoshina, A., Morishita, F.: Six cases of spontaneous peripelvic extravasation from renal pelvis.Acta Urol. Jpn., 31, 1171 (1985).
5. Sakaguchi, H., Seguchi, T., Kajikawa, H., Nishioka, T., Takada, M.: A case of spontaneous peripelvic extravasation associated with ureteral stenosis caused by retroperitoneal lymph node metastasis of the ascending colon cancer.Acta Urol. Jpn., 33, 1100 (1987).