
Reversion of cells to an immature or a less differentiated form, as occurs in most malignant tumors.
| anaphylaxis, anaphylatoxin, anaphylactoid reaction | |
| anaplerosis, anaplerotic metabolic pathway, ancestral sequence |
Loss of differentiation of cells, an irreversible alteration in adult cells toward more primitive (embryonic) cell types; a characteristic of tumor cells.
A regressive change in cells toward a more primitive or embryonic cell type. Anaplasia is a prominent criterion of malignancy in tumors.