Not an identifiable
Cause. As dr. Rosen said, most lymphedema
is secondary, meaning it is due to something like surgery and/or radiation.
Primary lymphedema is divided into three categories: congenital lymphedema, lymphedema praecox, and lymphedema tarda. Congenital means you are born with it and a small group of these are hereditary. Praecox develops before age 35 (most have this) and tarda develops after 35.