Giant hydronephrosis presenting as acute abdomen

We are reporting an interesting case where the right kidney had undergone hydronephrosis of gigantic proportion due to ureteropelvic junction obstrucion. The patient presented as an acute abdomen with no history of trauma. On laparotomy, he was found to have giant hydronephrosis of the right kidney with extensive oedema of the retroperitoneum due to leakage of urine