<prompt> True about primary lymphoedemaLymphangiosarcoma may occurAW Milroys diseaseOnset bw 2-35 years indicates lymphoedema tardaOnset 35 years indicates praecox variety  <response>: Lymphoedema Accumulation of fluid in extracellular and extravascular fluid compament , commonly in subcutaneous tissue. Classification: 1. Primary - without any identifiable disease. 2. Secondary- acquired due to definitive cause. Primary lymphoedema:- Affects commonly females. Common in lower limb and left side. It can be familial , syndromic Turners , Klinefelter;s , Down;s, Klipple Trenauy weber It can be 1. Lymphoedema congenital : present at bih 2yrs. Familial type is called Nonne- Milroy disease. 2. Lymphoedema praecox- present at pubey 2-35 years. Familial type is called Letessier- Meige;s syndrome. 3. Lymphoedema tarda- present in adult life after 35 years. Complications: Skin thickening, abscess, maggot formation. Recurrent cellulitis Lymphangiosarcoma Recurrent streptococcal infection. Reference: SRB;s manual of surgery, 5th edition , page no. 247 