Summary
Definition
History and exam
Key diagnostic factors
- profuse watery diarrhoea
Other diagnostic factors
- age around 50 years
- headache
- weight loss
- poor skin turgor
- dry mucous membranes
- muscle weakness
- muscle cramps
- flushing
- hepatomegaly
- history of multiple endocrine neoplasia type 1 (MEN1)
Risk factors
- multiple endocrine neoplasia type 1 (MEN1)
- age around 50 years
Diagnostic investigations
1st investigations to order
- serum potassium
- serum bicarbonate
- serum calcium
- serum glucose
- vasoactive intestinal peptide (VIP) radioimmunoassay
- liver function tests
Investigations to consider
- arterial blood gas analysis
- gastric pH monitoring
- chromogranin A
- pancreatic polypeptide
- contrast-enhanced CT scan of abdomen
- contrast-enhanced MRI of abdomen
- somatostatin receptor PET/CT
- somatostatin receptor scintigraphy
- endoscopic ultrasound
- abdominal ultrasound
- operative exploration
- intraoperative ultrasound
Treatment algorithm
initial presentation of symptomatic patient
localised disease
metastatic disease: surgical candidate
metastatic disease: non-surgical candidate
refractory disease
Contributors
Authors
Harish Lavu, MD, FACS

Professor of Surgery
Sidney Kimmel Medical College
Thomas Jefferson University
Philadelphia
PA
Disclosures
HL declares that he has no competing interests.
Charles J. Yeo, MD, FACS

The Samuel D. Gross Professor and Chair
Department of Surgery
Sidney Kimmel Medical College
Thomas Jefferson University
Philadelphia
PA
Disclosures
CJY declares that he has no competing interests.
Peer reviewers
Jaime Ruiz-Tovar, MD
Fellow of the Spanish Association of Surgeons (AEC)
Department of Surgery
University Hospital Ramon y Cajal
Madrid
Spain
Disclosures
JRT declares that he has no competing interests.
Christopher Wolfgang, MD, PhD, FACS
Assistant Professor of Surgery and Oncology
Cameron Division of Surgical Oncology
The Sol Goldman Pancreatic Cancer Research Center
Johns Hopkins University
Baltimore
MD
Disclosures
CW declares that he has no competing interests.
Differentials
- Infectious gastroenteritis
- Osmotic diarrhoea
- Ileal bile acid malabsorption
More DifferentialsGuidelines
- NCCN clinical practice guidelines in oncology: neuroendocrine and adrenal tumors
- NCCN clinical practice guidelines in oncology: neuroendocrine and adrenal tumors
More GuidelinesPatient information
Diarrhoea in adults
Diarrhoea in children
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