<prompt> The diagnosis of NET of the small bowel is made by24 hour urinary metanephrines24 hour urinary VMA24 hour urinary 5-HIAA24 hour urinry coisol  <response>: Elevated excretion of 5-hydroxyindoleacetic acid is a probable indicator of the presence of a serotonin-producing tumor carcinoidCT scan and MRI may show the primary tumour, mesenteric lymph node and liver metastases.The best method for staging of NET is an octreotide SRS scan. This will show all tumour deposits provided that they are large enough and have a high somatostatin receptor densityRef: Bailey and Love 27e pg: 855 