The pain appeared localized mostly to his back without any radiation.
 the patient has a compression fracture 
(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 has) (NP (DT a) (NN compression) (NN fracture)))))
( ( The pain ) ( ( appeared ( localized ( mostly ( to ( his ( back ( without ( any radiation ) ) ) ) ) ) ) ) . ) )
( ( the patient ) ( has ( a ( compression fracture ) ) ) )