CGA and neoplasm: Of the 29 lymph nodes with detectable CgA transcript from the non-neuroendocrine malignancies, 7 nodes belonged to three patients with adenocarcinomas (pancreatic, rectal, small intestinal) that had positive CgA IHC or histological evidence of neuroendocrine differentiation, and so should be regarded as exhibiting neuroendocrine differentiation and the CgA PCR result are interpreted as a true positive in terms of tumor phenotype.