LPL and hyperinsulinemic hypoglycemia, familial, 4: Our patients with hypertriglyceridaemic pancreatitis due to LPL deficiency were clinically different from the those with preserved LPL mass and activity, which explain their greater frequency of episodes of recurrent pancreatitis, the onset before adolescence, and the lower weight and body mass index than the patients with hypertriglyceridaemic pancreatitis and preserved LPL mass and activity.