Hi user Thanks for posting query you are having obstructive uropathy with hydronephrosis. This require ugent intervention. You may have severe colicky pain at anytime. Stone at upper pole may not require ugent intervention but stone near vesicoureteric junction which is cusing back pressure changes should be removed as early as possible. Stone at this location can be removed without open surgery by basket. Expert urologists who aredoing this procedure regularly, you can consult them. Hope you are benefited withinformation. Take care