Management of 26 patients with chylothoraces. Chylothoraces were first-line treated with MCT-diet, which was effective in 71%. All patients but one tolerated rapid conversion to regular nutrition formula within 1 week after the chylothorax had disappeared. In 4 patients different additional treatments were effective. Two patients (grey setting box), both with low cardiac output and persistent capillary leackage died with remaining chylothorax despite numerous treatment attempts.