What are the tests that detect gastrointestinal carcinoid tumors?

Imaging studies and tests that examine the blood and urine are used to detect and diagnose gastrointestinal carcinoid tumors.

The following tests and procedures may be used:

• Physical exam and history
• Complete blood count
• Blood chemistry studies
• Tumor marker test
• Twenty-four-hour urine test
• Somatostatin receptor scintigraphy (SRS): A type of radionuclide scan used to find carcinoid tumors 
• MIBG scan: A procedure used to find neuroendocrine tumors, such as carcinoid tumors 
• CT scan (CAT scan)
• MRI (magnetic resonance imaging)
• PET scan (positron emission tomography scan)
• Endoscopic ultrasound (EUS)
• Upper endoscopy
• Colonoscopy
• Capsule endoscopy
• Biopsy

This answer is based on source information from the National Cancer Institute.