The pain appeared localized mostly to his back without any radiation.
 the patient denies back pain
(ROOT (S (NP (DT The) (NN pain)) (VP (VBD appeared) (VP (JJ localized) (S (ADVP (RB mostly)) (VP (TO to) (VP (PRP$ his) (ADVP (RB back) (PP (IN without) (NP (DT any) (NN radiation))))))))) (. .)))
(ROOT (S (NP (DT the) (NN patient)) (VP (VBZ denies) (ADVP (RB back)) (NP (NN pain)))))
( ( The pain ) ( ( appeared ( localized ( mostly ( to ( his ( back ( without ( any radiation ) ) ) ) ) ) ) ) . ) )
( ( the patient ) ( ( denies back ) pain ) )