<prompt> True about primary lymphedema:a Prevalence is 2b Onset bw 2-35 years indicates lymphedema tardac Onset 35 yrs indicates praecox type d Associated with Milroys disease e Lymphangiosarcoma may occurabdedebdebcde  <response>: The primary lyrnphedemas are relatively uncommon, occurring in 1 of every 10,000 individuals-SabistonLymphangiosarcoma is a rare tumor that develops as a complication of long-standing usually more than 10 years lymphedema.- SabistonCutaneous lymphangiosarcoma may develop in chronically lymphedematous extremities.- Devita 8e Chapter 45 