Serum or Plasma Area Under the Curve (AUC) for a Neuroendocrine Hormone (e.g., Pancreatic Polypeptide, Somatostatin, or Related Metabolite)

What This Test Measures

An AUC test quantifies the cumulative effect of a hormone or metabolite in your blood or plasma over a defined period. Unlike a single blood draw, this method reflects how your body handles the substance over time, which can be critical for diagnosing or monitoring conditions like neuroendocrine tumors or metabolic disorders.

Why It’s Used

AUC testing is particularly useful for neuroendocrine hormones, which may fluctuate unpredictably. It helps doctors track how well your body processes these substances, especially in conditions where hormone levels aren’t stable or where standard single-point measurements are insufficient.

Common Conditions Monitored

This type of test may be used to monitor patients with suspected or known neuroendocrine tumors, such as those affecting the pancreas, gut, or other endocrine glands. It can also help assess metabolic or hormonal imbalances in conditions like diabetes, obesity, or certain endocrine disorders.

Sample Collection and Preparation

A blood sample is drawn, typically from a vein in your arm. The sample is processed into either serum (after clotting) or plasma (using an anticoagulant). The blood is then sent to a lab for specialized analysis to measure the hormone’s cumulative effect over time.