Carcinoid syndrome

update on the pathophysiology and treatment


  • Anezka C. Rubin de Celis Ferrari Hospital Sirio Libanes. Departamento de Oncologia
  • João Glasberg Universidade de Sao Paulo. Faculdade de Medicina. Hospital das Clinicas. Instituto do Cancer do Estado de Sao Paulo
  • Rachel P. Riechelmann AC Camargo Cancer Center Sao Paulo. Departamento de Oncologia



Neuroendocrine Tumors, Carcinoid Syndrome, Neoplasm


Approximately 30-40% of patients with well-differentiated neuroendocrine tumors present with carcinoid syndrome, which is a paraneoplastic syndrome associated with the secretion of several humoral factors. Carcinoid syndrome significantly and negatively affects patients’ quality of life; increases costs compared with the costs of nonfunctioning neuroendocrine tumors; and results in changes in patients’ lifestyle, such as diet, work, physical activity and social life. For several decades, patients with neuroendocrine tumors and carcinoid syndrome have been treated with somatostatin analogues as the first-line treatment. While these agents provide significant relief from carcinoid syndrome symptoms, there is inevitable clinical progression, and new therapeutic interventions are needed. More than 40 substances have been identified as being potentially related to carcinoid syndrome; however, their individual contributions in triggering different carcinoid symptoms or complications, such as carcinoid heart disease, remain unclear. These substances include serotonin (5-HT), which appears to be the primary marker associated with the syndrome, as well as histamine, kallikrein, prostaglandins, and tachykinins. Given the complexity involving the origin, diagnosis and management of patients with carcinoid syndrome, we have undertaken a comprehensive review to update information about the pathophysiology, diagnostic tools and treatment sequence of this syndrome, which currently comprises a multidisciplinary approach.


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How to Cite

Ferrari, A. C. R. de C., Glasberg, J., & Riechelmann, R. P. (2019). Carcinoid syndrome: update on the pathophysiology and treatment. Clinics, 73(Suppl. 1), e490s.



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