1 In 1990, Barack Obama was elected as the first black president of the Harvard Law Review. 2  Obama, who graduated from HLS in 1991, would later represent Illinois in the U.S Senate, and in 2008 would become the 44 th President of the United States, and the first African-American president.
Most cancers in the lung are carcinomas-cancers of epithelial cells. The top pair of images shows the normal epithelium of the bronchi. This photomicrograph is greatly enlarged. The next three pairs of images show three successive stages of abnormal changes in the bronchial epithelium commonly found in smokers.
Each lung has sections called lobes. Two tubes called bronchi lead from the trachea (windpipe) to the lungs.The two main types of lung cancer are non-small cell lung cancer and small cell lung cancer.The types are based on the way the cells look under a microscope. Non-small cell lung cancer is much more common than small cell lung cancer.Tobacco smoking is the most common cause of lung cancer.Lung cancer is the leading cause of death from cancer in the U.S. and the number of deaths from lung cancer in women is increasing. For most patients with lung cancer, current treatments do not cure the cancer.ach lung has sections called lobes. Two tubes called bronchi lead from the trachea (windpipe) to the lungs.The two main types of lung cancer are non-small cell lung cancer and small cell lung cancer.