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.

youdao

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.

youdao