( ( In ( this process ) ) ( , ( ( as ( with ( epithelial cancers ) ) ) ( , ( ( the ( tumor cells ) ) ( ( must ( ( ( degrade and ) traverse ) ( ( the barriers ) ( of ( ( ( the ( basement membrane ) ) and ) ( the ( stromal ( extracellular matrix ) ) ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (PP (IN In) (NP (DT this) (NN process))) (, ,) (PP (IN as) (PP (IN with) (NP (JJ epithelial) (NNS cancers)))) (, ,) (NP (DT the) (NN tumor) (NNS cells)) (VP (MD must) (VP (VB degrade) (CC and) (VB traverse) (NP (NP (DT the) (NNS barriers)) (PP (IN of) (NP (NP (DT the) (NN basement) (NN membrane)) (CC and) (NP (DT the) (JJ stromal) (NN extracellular) (NN matrix))))))) (. .)))
In this process, as with epithelial cancers, the tumor cells must degrade and traverse the barriers of the basement membrane and the stromal extracellular matrix.
(ROOT (S (NP (NP (DT A) (NN cell) (POS 's)) (NN membrane)) (VP (VBZ provides) (NP (DT a) (NN barrier) (S (VP (TO to) (VP (VB keep) (NP (NN extracellular) (NNS materials)) (PP (IN from) (S (VP (VBG mixing) (PP (IN with) (NP (PRP$ its) (JJ internal) (NNS components))))))))))) (. .)))