Chromogranin a Measurement in Metastatic Well-Differentiated Gastroenteropancreatic Neuroendocrine Carcinoma: Screening for False Positives and a Prospective Follow-Up Study

Abstract

Routine screening for the causes of false-positive CgA measurements is mandatory in WDGEPNET patients. Our study does not validate the use of CgA as a surrogate marker of tumor progression.