Definition – Hyperplasia is defined as increase in the number of cells resulting in the increase in mass of tissue or organ. Hyperplasia takes place in the cells if they are capable of dividing.
Types of hyperplasia
Physiologic hyperplasia –
Hormonal hyperplasia – eg. Proliferation of glandular epithelial cells of female breast tissue at puberty and lactation
Compensatory hyperplasia – eg. Liver regeneration after partial hepatectomy
Pathologic hyperplasia –
Endometrial hyperplasia due to excess of estrogen hormones
Benign prostatic hyperplasia due to excess of androgens