This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
The diagnosis of NET of the small bowel is made by 
Select and explain. 
A. 24 hour urinary metanephrines, B. 24 hour urinary VMA, C. 24 hour urinary 5-HIAA, D. 24 hour urinry coisol
C: 24 hour urinary 5-HIAA
Answer: C: 24 hour urinary 5-HIAA 
Explanation: Elevated excretion of 5-hydroxyindoleacetic acid is a probable indicator of the presence of a serotonin-producing tumor (carcinoid)CT 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