Interior of the cecum and lower end of ascending colon with the ileocecal valve labeled as colic valve. Endoscopic image of cecum with arrow pointing to ileocecal valve in foreground.
Lung cancer is a malignant tumour that starts in the cells of the lung. Malignant means that it can spread, or metastasize, to other parts of the body. When cancer starts in lung cells, it is called primary lung cancer. The lung is part of the respiratory system. You use your lungs when you breathe.
Lung cancer types. There are two main types of lung cancer: small cell lung cancer (SCLC) and non-small lung cancer (NSCLC). Non-small cell and small cell lung cancers are classified according to cell size and type.NSCLC accounts for nearly nine out of every 10 cases.mall cell lung cancer. Small cell lung cancer, which is often referred to as oat cell lung cancer because the cells resemble oats under the microscope, begins in the lung tissue. Unlike most non-small cell lung cancer, it often spreads quickly.