( Leukoencephalopathy ( ( -LRB- ( ( degeneration ( of ( the ( white matter ) ) ) ) -RRB- ) ) ( ( occurs ( at ( ( ( the ( tumor site ) ) and ) ( surrounding ( irradiated brain ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Leukoencephalopathy)) (PRN (-LRB- -LRB-) (NP (NP (NN degeneration)) (PP (IN of) (NP (DT the) (JJ white) (NN matter)))) (-RRB- -RRB-)) (VP (VBZ occurs) (PP (IN at) (NP (NP (DT the) (NN tumor) (NN site)) (CC and) (NP (VBG surrounding) (JJ irradiated) (NN brain))))) (. .)))
Leukoencephalopathy(degeneration of the white matter) occurs at the tumor site and surrounding irradiated brain.
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (DT the) (JJ gray) (NN matter)))) (VP (VBZ is) (PP (IN on) (NP (NP (DT the) (NN surface)) (PP (IN of) (NP (DT the) (NN brain))))) (, ,) (S (VP (VBG surrounding) (NP (JJ white) (NN matter))))) (. .)))