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.
People with a type of adenocarcinoma called adenocarcinoma in situ (previously called bronchioloalveolar carcinoma) tend to have a better outlook (prognosis) than those with other types of lung cancer. Large cell (undifferentiated) carcinoma: This type of cancer accounts for about 10% to 15% of lung cancers.If a lung cancer has some cells with characteristics of SCLC and other cells with characteristics of NSCLC it is called a combined small cell/non-small cell cancer. This is uncommon.). These 2 types of lung cancer are treated very differently. This document focuses on non-small cell lung cancer.