Chromogranin A & B (CGA/CGB) Included in Gut Hormones
Send to laboratory immediately on ice. Must arrive in <15 minutes of venepuncture to allow for separation of plasma.
Hospital.
All Colchester & Ipswich samples: 2 x 3.4ml Red EDTA
All Colchester & Ipswich samples: Charing Cross, TAT: 7 Days
Fasting required