A 18-year-old man presented to the surgical unit with acute pancreatitis On examination, he had eruptive xanthomata on arms and thighs . . Plasma fasting lipids as the follows: Sample grossly lipaemic. Cholesterol 35 mmol/L (3.5–5.0) Triglyceride 71 mmol/L (0.3–1.5) HDL cholesterol 0.8 mmol/L (1.0–1.8) Amylase 18 U/L (