Hyperplasia
Hyperplasia (from Ancient Greek ὑπέρ (hupér) 'over' and πλάσις (plásis) 'formation'), or hypergenesis, is an enlargement of an organ or tissue caused by an increase in the amount of tissue that results from cell proliferation. It may lead to the gross enlargement of an organ, and the term is sometimes confused with benign neoplasia or benign tumor.