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Pathology - Carcinoid Syndrome
The patient is experiencing carcinoid syndrome as a result of a malignant tumor in the small bowel.
The majority of these tumors are located in the appendix. However, tumors detected in the small bowel have the ability to spread to the liver and result in the symptoms mentioned in the vignette. The symptoms arise as a result of the secretion of serotonin by the tumor cells.
Serotonin is transported to the liver by the hepatic portal circulation, where it undergoes metabolism. After being produced, the metabolites, such as 5-hydroxyindoleacetic acid (5-HIAA), are released into the bloodstream and result in vasodilation (flushing), diarrhea, and enhanced production of collagen in the heart valves (murmur). The tricuspid and pulmonic valves are commonly impacted. Octreotide, a somatostatin agonist, can be used to provide symptomatic therapy by reversing vasodilation generated by 5-HIAA. Nevertheless, the administration of chemoembolization to the blood arteries that supply liver metastases may offer extended and sustained relief.
The patient is experiencing carcinoid syndrome as a result of a malignant tumor in the small bowel.
The majority of these tumors are located in the appendix. However, tumors detected in the small bowel have the ability to spread to the liver and result in the symptoms mentioned in the vignette. The symptoms arise as a result of the secretion of serotonin by the tumor cells.
Serotonin is transported to the liver by the hepatic portal circulation, where it undergoes metabolism. After being produced, the metabolites, such as 5-hydroxyindoleacetic acid (5-HIAA), are released into the bloodstream and result in vasodilation (flushing), diarrhea, and enhanced production of collagen in the heart valves (murmur). The tricuspid and pulmonic valves are commonly impacted. Octreotide, a somatostatin agonist, can be used to provide symptomatic therapy by reversing vasodilation generated by 5-HIAA. Nevertheless, the administration of chemoembolization to the blood arteries that supply liver metastases may offer extended and sustained relief.
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