What are the symptoms of islet cell carcinoid?

Islet cell carcinoid is a low-grade malignant tumor, tumor cells can secrete serotonin, the patient's clinical manifestations will also be related to hormones secreted in the body. 5-HT can cause multiple systemic lesions, the most common clinical symptoms, can cause skin flushing, mainly in the face and front chest skin flushing. 5-HT can dilate blood vessels, causing patients to show symptoms of hypotension; Serotonin can also cause tracheal spasms, and patients may exhibit breathing difficulties and wheezing. Serotonin acts on the digestive system, causing watery stools.