<prompt> All are true about congenital lymphedema except?It is bilateralInvolve lower limbAlmost always manifests before pubeyNone  <response>: Ans. is None Primary lymphedema has been classified on the basis of the age at onset and presence of familial clustering. a Congenital lymphedema - has onset before the 1st year of life according to Schwaz and Bailey onset is - congenital lymphedema can involve a single lower extremity, multiple limbs, the genitalia or the face it is more likely to be bilateral involve whole leg the familial version of congenital lymphedema is ka Milroys ds. b Lymphedema praecox primary lymphedema with onset bw the age of 1 and 35 yrs is called lymphedema praecox this is the most common form of primary lymphedema accounting for 90 of cases praecox is far more common in women 10:1 - praecox lymphedema more likely to be unilateral and usually extends only to the knees i.e. involves foot calf the familial version of lymphedema praecox is ka Meiges ds. c Lymphedema tarda primary lymphedema with onset after the age of 35 yrs is called lymphedema tarda 