[Idiopathic edema].

Idiopathic edema is an orthostatic edema accompanied by excessive weight gain from morning to evening. It occurs almost exclusively in post pubertal women and is independent of menstral cycle. Although the cause is not clear, a number of hormonal abnormalities are postulated to be involved. These include rennin-angiotensin-aldosterone axis, vasopressin, atrial natriuretic factor, dopamine, hypothalamic disorders, and thyroid disorders. In addition, exaggerated postual abnormalities, psychological or emotional disturbance, eating disorders, and abuse of diuretic or laxative are also associated with the onset of edema.