Carcinoid

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.

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Treatment is initially with surgery, and with chemotherapy if the tumour has spread.

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Malignant: In medicine, malignant is a clinical term that is used to describe a clinical course that progresses rapidly to death. It is typically applied to neoplasms that show aggressive behavior characterised by local invasion or distant metastasis....

Mucosa: REDIRECT Mucous membrane...

Lung: The lung is the essential organ of respiration in air-breathing vertebrates....