2 Indications and current treatments
2.1 Lung cancer is one of the most common cancers in the UK. The symptoms often do not appear until the disease is advanced, and the prognosis is generally poor. There are 2 main types of primary lung cancer: small-cell lung cancer (which is fast growing and can spread quickly) and non-small-cell lung cancer (which usually grows and spreads slowly; this includes cancers that grow in squamous cells or in the periphery of the lung). The lung is also a common site for metastases from other primary cancers such as breast and colon cancer.
2.2 Treatments for primary lung cancer or metastases in the lung include surgical resection, chemotherapy, radiotherapy, photodynamic therapy, thermal ablation, or a combination of these. If the tumour protrudes into the major airways, interventional bronchoscopic treatments including diathermy, laser therapy, cryotherapy, brachytherapy or photodynamic therapy may be used.