1. Carcinoid Tumour Biochemical and Radiological Testing Gillian Harris 4 th year MBBS

18. Octreotide scintigraphy-highest sensitivity MIBG-when negative scan Endoscopic ultrasound-90% accuracy for localisation and staging of colorectal carcinoids MRI Hindgut Octreotide Scintigraphy-staging and identification of primary lesion. 83% diagnostic accuracy, 100% PPV Transabdominal Ultrasound-1/3 Small bowel carcinoids, 2/3 liver metastases CT/MRI-to monitor responsiveness to treatment, only detect 50% primary tumours Double contrast barium studies-to assess for imminent obstruction Midgut Chest radiography-occasionally detects lesions CT/MRI-identification of primary tumour, lymph nodes, facilitates biopsy diagnosis Octreotide Scintigraphy-negative in 30% but most specific Foregut Imaging (12) Tumour type