cellular adaption (pathology)

Cellular adaption is refer to the change made by cell response to adverse environment changes. The adaption maybe physiology (normal) or pathologic ( not normal).
They are five type adaption:-

1. Atrophy -cell adapt where it decrease in cell size
2. Hypertropy -cell adapt where it increase in cell size
3. Hyperplasia - cell adapt to increase in the number of cell
4. Dysplasia - generally refer to abnormal change in cellular cell,shape,size and organization. dysplasia is not considered a  true adaption even though it related to hyperplasia. Dyplasia often occur in the vicinity of cancerous cells and maybe involve in development of breast cancer.
5. Metaplasia - occur when a differentiated cell of certain type is replace by another cell type.