Write about Carcinoid tumour here.

• Rare tumour

• Less malignant than bronchial carcinoma, due to:

• Rarely metastasising

• Slow growth

• Though may invade locally

• Not related to smoking

• Affects younger patients

• Most arise in main bronchi

• Present with haemoptysis and wheeze

• On bronchoscopy, smooth rounded appearance (cherry-like)

• May bleed profusely on biopsy

• Most cured by resection

• Very rarely metastasises to the liver where secretion of substances such as 5-hydroxy indoleacetic acid (5-HIAA) produces the carcinoid syndrome of flushing, diarrhoea and wheeze