( ( ( ( ( Leukemia , ) though ) ( ( not one ) ( of ( the ( most ( common cancers ) ) ) ) ) ) , ) ( ( is ( one ( of ( the ( most ( rapidly fatal ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Leukemia)) (, ,) (ADVP (RB though)) (NP (NP (RB not) (CD one)) (PP (IN of) (NP (DT the) (JJS most) (JJ common) (NNS cancers)))) (, ,)) (VP (VBZ is) (NP (NP (CD one)) (PP (IN of) (NP (DT the) (ADJP (RBS most) (RB rapidly) (JJ fatal)))))) (. .)))
Leukemia, though not one of the most common cancers, is one of the most rapidly fatal.
(ROOT (S (NP (NNP Leukemia)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (JJ common)) (NN type)) (PP (IN of) (NP (NP (NN cancer)) (VP (VBN developed) (PP (IN in) (NP (NNS children)))))))) (. .)))