What are the Types of Gynecomastia?

What is gynecomastia? It is the excessive chest growth of breast tissue inside the breast glands. The word gynecomastia is an amalgamation of two Greek words ‘gynaik’, which means ‘female’ and ‘mastós’ meaning ‘breast’. So the two words gynaik and mastós together form the word gynecomastia, meaning female breasts.