Carcinoid is a potentially malignant tumour that occurs in the mucosa of the lungs and digestive tract and potentially in other organs. Generally, it causes symptoms due to its secretion of neurohormones, causing diarrhoea, flushing and heart disease, as well as other phenomena (such as Cushing's disease); occasionally, haemorrhage and a mass effect are the presenting symptoms.
Treatment is initially with surgery. Chemotherapy, if the tumour has spread, is of little benefit and is generally not indicated. Octreotide (a somatostatin analogue) may decrease the activity of the carcinoid.
See also