( ( Surgery ( to ( ( ( repair ( the ureter ) ) or ) ( remove ( the kidney ) ) ) ) ) ( , ( ( if ( ( other treatment ) fails ) ) . ) ) )
(ROOT (FRAG (ADJP (RB Surgery) (S (VP (TO to) (VP (VP (VB repair) (NP (DT the) (NN ureter))) (CC or) (VP (VB remove) (NP (DT the) (NN kidney))))))) (, ,) (SBAR (IN if) (S (NP (JJ other) (NN treatment)) (VP (VBZ fails)))) (. .)))
Surgery to repair the ureter or remove the kidney, if other treatment fails.
(ROOT (S (NP (DT The) (NN option) (S (VP (TO to) (VP (VB remove) (S (NP (NN kidney) (NNS stones)) (ADJP (JJ other) (PP (IN than) (NP (NN surgery))))))))) (VP (VBZ is) (NP (NN ultrasound) (NNS treatments))) (. .)))