What are the signs and symptoms of familial chylomicronemia syndrome (FCS)?8,36

A distinctive sign of FCS is extremely high TGs (greater than 880 mg/dL or 10 mmol/l) and blood that appears fatty or milky after it is drawn. Patients often have severe, sometimes daily, abdominal pain and often experience pain that feels like it comes from their back.

Because of sustained high TG levels, patients with FCS are also at risk of a painful condition called pancreatitis, which is inflammation of the pancreas. Patients may also experience vomiting and diarrhea. If undiagnosed, FCS can have serious, life-threatening complications.

See figure above for signs and symptoms of FCS.