名詞 anaplasia:

1. loss of structural differentiation within a cell or group of cells often with increased capacity for multiplication, as in a malignant tumor

an.a.pla.sia

n.（名詞）
Reversion of cells to an immature or a less differentiated form, as occurs in most malignant tumors.
退行發(fā)育：細胞退化到不成熟或未變異的狀態(tài)，如多數惡性腫瘤