An increase in the number of cells in a tissue or organ without tumor formation. It differs from HYPERTROPHY, which is an increase in bulk without an increase in the number of cells.
Hyperplasias
D007223
Infant
A child between 1 and 23 months of age.
Infants
D008208
Lymphatic System
A system of organs and tissues that process and transport immune cells and LYMPH.
Lymphatic Systems
D003106
Colon
The segment of LARGE INTESTINE between the CECUM and the RECTUM. It includes the ASCENDING COLON; the TRANSVERSE COLON; the DESCENDING COLON; and the SIGMOID COLON.