瘤组织内血管稀少，未见类微血管样结构；
Rarefied vessels were found in tumor, and no vessel like structure formed by tumor cells was observed.
细胞接种在细胞外基质凝胶中可形成毛细血管样结构。
The inoculation of ECs on the extra cellular matrix gel formed capillary-like structures.
PDGF有利于三维培养内皮细胞在有展性的胶原基质面形成血管样结构。
Three dimension cell culture found PDGF could induce endothelial cell angiogenesis in vitro.
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