vasoactive intestinal peptide-secreting tumor a group of rare neuroendocrine tumors - Vasoactive intestinal peptidetumors VIPomas are neuroendocrine tumors that secrete vasoactive intestinal peptide Understanding Vasoactive Intestinal Peptide-Secreting Tumors (VIPomas)

Vipsecreting tumorinsulin Vasoactive intestinal peptide-secreting tumors, commonly known as VIPomas, represent a rare and distinct category of neuroendocrine neoplasm secreting vasoactive intestinal peptide. These tumors are characterized by their ability to autonomously produce and secrete excessive amounts of vasoactive intestinal peptide (VIP), a hormone that plays a crucial role in various physiological processes, including intestinal secretion and smooth muscle relaxation. The hypersecretion of VIP by these tumors leads to a specific clinical syndrome, most notably severe watery secretory diarrhea.

What is a VIPoma?

A VIPoma is a tumor that arises from the endocrine cells of the pancreas, though they can occasionally develop in other locations, such as the adrenal gland or sympathetic ganglia. Specifically, they are considered very rare pancreatic neuroendocrine tumors (PNETs), accounting for a small percentage of all pancreatic neuroendocrine tumors作者：A Helbing·2025—VIPomas are rare neuroendocrine tumors of the pancreas that secrete vasoactive intestinal peptide(VIP), leading to profound watery diarrhea, hypokalemia, and .... The term VIPoma itself is derived from the hormone it secretes. While often referred to as a neuroendocrine neoplasm secreting vasoactive intestinal peptide, the primary characteristic is the excessive production of VIP.

Origin and Development:

These tumors typically develop in the pancreas's endocrine cells, specifically the islet cells of the pancreas.作者：N Nilubol·2016·被引用次数：15—The vasoactive intestinal peptide-secreting neuroendocrine tumor (VIPoma), also known as Verner-Morrison syndrome,is a very rare tumorwith an annual incidence ... They are classified as non-beta pancreatic islet cell tumors secreting vasoactive intestinal peptide, indicating they do not originate from the insulin-producing beta cells. The development of a VIPoma is a complex process, but the key feature is the uncontrolled growth of these specialized cells, leading to their secretory function. While most VIPomas are benign, they can be a rare mostly malignant neuroendocrine tumor, and some can metastasizeVIPoma - StatPearls - NCBI Bookshelf - NIH.

The Verner-Morrison Syndrome:

The clinical manifestation of a VIPoma is often referred to as the Verner-Morrison syndrome, also known as the WDHA syndrome (Watery Diarrhea, Hypokalemia, Achlorhydria)作者：EU Cidon·2022·被引用次数：20—Vasoactive intestinal peptide (VIP) secreting tumour (VIPoma) isa rare functional neuroendocrine tumourthat typically arises from pancreatic islet cells.. The hallmark symptom is severe, chronic, and profuse watery diarrhea, which can lead to significant fluid and electrolyte imbalances作者：EN Karele·2024·被引用次数：3—Vasoactive intestinal peptide secreting tumor (VIPoma)is a rare mostly malignant neuroendocrine tumorthat is characterized by watery diarrhea, hypokalemia .... This is directly attributable to the action of excess VIP on the intestinal tract, stimulating fluid and electrolyte secretion.

Key Symptoms and Complications:

* Profuse Watery Diarrhea: This is the most prominent symptom, often occurring in frequent, large-volume stools. The diarrhea is typically watery and may persist for extended periods.

* Hypokalemia: The excessive loss of fluid and electrolytes in the stool can lead to dangerously low potassium levels in the blood作者：A Helbing·2025—VIPomas are rare neuroendocrine tumors of the pancreas that secrete vasoactive intestinal peptide(VIP), leading to profound watery diarrhea, hypokalemia, and .... Hypokalemia can manifest as muscle weakness, fatigue, and cardiac arrhythmias.

* Metabolic Acidosis: Severe diarrhea can also lead to a loss of bicarbonate, resulting in metabolic acidosis.VIPoma: Mechanisms, clinical presentation, diagnosis and ...

* Dehydration: The significant fluid loss can cause dehydration, leading to thirst, dry mouth, and decreased urine output作者：U Cidon·2022·被引用次数：20—Vasoactive intestinal peptide (VIP) secreting tumour (VIPoma) isa rare functional neuroendocrine tumourthat typically arises from pancreatic islet cells..

* Flushing: Some patients may experience episodes of flushing, though this is less common than with other types of neuroendocrine tumorsVasoactive Intestinal Polypeptide Secreting Tumor - VIPoma.

* Vomiting and Abdominal Pain: While less common, these symptoms can also occur.

The syndrome is directly linked to the role of VIP is the substance responsible for the diarrhea that accompanies some neural crest tumors. This understanding highlights the direct pathophysiological connection between the tumor's secretion and the patient's symptoms作者：SJ Kaplan·1980·被引用次数：87—Evidence supports the theory thatVIP is the substance responsible for the diarrhea that accompanies some neural crest tumors. (Am J Dis Child 134:21-24 ....

Diagnosis and Management:

Diagnosing a vasoactive intestinal peptide-secreting tumor involves a multi-faceted approach.2024年3月3日—Vasoactive intestinal peptide-secreting tumors, or VIPomas, areneuroendocrine tumors that secrete excessive amounts of vasoactive ... This typically includes:

* Measuring VIP Levels: The most crucial diagnostic step is measuring elevated levels of vasoactive intestinal peptide in the blood. This is often done through a blood test. Elevated VIP, not linked to other causes, strongly suggests the presence of a VIPoma作者：PJ Yeh·2020·被引用次数：11—Vasoactive intestinal peptide (VIP) secreting tumor(VIPoma) is a rare disease, presenting with profuse diarrhea, electrolyte imbalance, and possibly fatal ....

* Imaging Studies: Various imaging techniques are employed to locate the tumor. These can include:

* CT scans (Computed Tomography)

* MRI scans (Magnetic Resonance Imaging)

* Somatostatin Receptor Scintigraphy (Octreotide Scan)

* Endoscopic Ultrasound (EUS)

* Biopsy: In some cases, a biopsy of a suspicious lesion may be necessary for definitive diagnosis and to assess the tumor's characteristicsVASOACTIVE INTESTINAL PEPTIDE TUMOR (VIPoma).

The treatment for a VIPoma depends on several factors, including the tumor's size, location, and whether it has metastasized. Management strategies may include:

* Surgery: Surgical resection of the tumor is often the primary treatment, especially if the tumor is localized and has not spread. The goal is to remove the tumor and stop the excessive VIP production.

* Medications: Medications such as somatostatin analogs (e.g., octreotide) can help control the diarrhea and electrolyte imbalances by inhibiting VIP secretion.

* Chemotherapy or Targeted Therapy: For metastatic or unresectable tumors, chemotherapy or targeted therapies may be used to manage the diseaseChronic Diarrhea Caused by Vasoactive Intestinal Peptide ....

Prognosis:

The prognosis for individuals with a VIPoma varies widely.A very raretumorthatusually forms in the islet cells of the pancreasand makes the hormonevasoactive intestinal peptide(VIP). Benign tumors that are completely resected surgically generally have an excellent prognosisVasoactive Intestinal Peptide–Secreting Tumors. However, for malignant or metastatic VIPomas, the prognosis is more guarded, and long-term management is often required.作者：L Abdullayeva·2019·被引用次数：19—Vasoactive intestinal peptide (VIP) secreting tumour(VIPoma) is a rare neuroendocrine tumour that most often originates from pancreatic ... The rarity of these tumors means that extensive clinical experience and ongoing research are vital for optimal patient care.作者：SR BLOOM·1988·被引用次数：29—Clinicopathological study ofpancreatic and ganglioneuroblastoma tumors secreting vasoactive intestinal polypeptide(VIPomas). Br. Med. J. 282 1767- 1771. While they are a group of rare neuroendocrine tumors, advancements in diagnostic and therapeutic approaches continue to improve outcomes for patients.A vipoma is anon-beta pancreatic islet cell tumor secreting vasoactive intestinal peptide(VIP), resulting in a syndrome of watery diarrhea, hypokalemia, and ...

In summary, Vasoactive Intestinal Peptide-Secreting Tumor (VIPoma) is a rare but significant condition characterized by the overproduction of VIP, leading to severe watery diarrhea and electrolyte disturbances, often referred to as Verner-Morrison syndrome. Early diagnosis and appropriate management by experienced medical professionals are critical for improving the quality of life and outcomes for affected individuals作者：U Cidon·2022·被引用次数：20—Vasoactive intestinal peptide (VIP) secreting tumour (VIPoma) isa rare functional neuroendocrine tumourthat typically arises from pancreatic islet cells..