VIPoma medical therapy
|
VIPoma Microchapters |
|
Diagnosis |
|---|
|
Treatment |
|
Case Studies |
|
VIPoma medical therapy On the Web |
|
American Roentgen Ray Society Images of VIPoma medical therapy |
|
Risk calculators and risk factors for VIPoma medical therapy |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Madhu Sigdel M.B.B.S.[2]Parminder Dhingra, M.D. [3]
Overview
Initial treatment in patient with VIPoma is prompt replacement of fluid and correction of electrolyte imbalance and acid-base disturbance.[1]
Medical Therapy
Symptomatic treatment
- Initial treatment in patient with VIPoma is prompt replacement of fluid and electrolyte losses. The IV fluid of choice is isotonic normal saline with added potassium and bicarbonate as necessary.
- Somatostatin analogues like short acting octreotide (50-100mcg every 8 hours) are useful for controlling diarrhea by blocking the release of VIP. Octreotide is later replaced by longer acting depot preparation of somatostatin analogues like sandostatin (20 mg IM every 4 weeks) and Lanreotide (120mg subQ every 4 weeks)
- Steroids are used in diarrhea of VIPoma refractory to somatostatin (prednisone 60 mg per day).[2]
- Sunitinib (37.5 mg oral once a day) a tyrosin kinase inhibitor has some evidence of symptomatic and biochemical control in somatostatin analogue resistant VIPoma.[3][4] It is also a medical treatment for locally advanced unresectable or advanced metastatic VIPoma.
Medical management of advanced local or metastatic disease
- There has been limited use of chemotherapy in patients with VIPoma. However, streptozocin based chemotherapy is considered best.
- Most successful and favourable combination regimen of chemotherapy is Streptozocin with doxorubicin together with somatostatin analogues. 5-FU can be used as alternative to doxorubicin for concerns of adverse effects but is inferior.[5]
- Molecularly targeted therapy eg. Sunitinib [37.5 mg per day to maximum 50 mg per day] (a tyrosine kinase inhibitor) is approved for treatment of progressive, unresectable, locally advanced or metastatic well differenctiated VIPoma. It is used in combination with somatostatin analogue.[4]
- Other molecular targeted therapy undergoing research for treatment are Everolimus (mTOR inhibitor) and Bevacizumab ( anti-VEGF monoclonal antibody).[6]
References
- ↑ Vinik A. Vasoactive Intestinal Peptide Tumor (VIPoma) [Updated 2013 Nov 28]. In: De Groot LJ, Beck-Peccoz P, Chrousos G, et al., editors. Endotext [Internet]. South Dartmouth (MA): MDText.com, Inc.; 2000-. Available from: http://www.ncbi.nlm.nih.gov/books/NBK278960/
- ↑ O'Dorisio TM, Mekhjian HS, Gaginella TS (1989). "Medical therapy of VIPomas". Endocrinol Metab Clin North Am. 18 (2): 545–56. PMID 2545444.
- ↑ Dimitriadis GK, Weickert MO, Randeva HS, Kaltsas G, Grossman A (2016). "Medical management of secretory syndromes related to gastroenteropancreatic neuroendocrine tumours". Endocr Relat Cancer. 23 (9): R423–36. doi:10.1530/ERC-16-0200. PMID 27461388.
- ↑ 4.0 4.1 Zhang J, Francois R, Iyer R, Seshadri M, Zajac-Kaye M, Hochwald SN (2013). "Current understanding of the molecular biology of pancreatic neuroendocrine tumors". J Natl Cancer Inst. 105 (14): 1005–17. doi:10.1093/jnci/djt135. PMID 23840053.
- ↑ Kouvaraki MA, Ajani JA, Hoff P, Wolff R, Evans DB, Lozano R; et al. (2004). "Fluorouracil, doxorubicin, and streptozocin in the treatment of patients with locally advanced and metastatic pancreatic endocrine carcinomas". J Clin Oncol. 22 (23): 4762–71. doi:10.1200/JCO.2004.04.024. PMID 15570077.
- ↑ Moertel CG, Lefkopoulo M, Lipsitz S, Hahn RG, Klaassen D (1992). "Streptozocin-doxorubicin, streptozocin-fluorouracil or chlorozotocin in the treatment of advanced islet-cell carcinoma". N Engl J Med. 326 (8): 519–23. doi:10.1056/NEJM199202203260804. PMID 1310159.