Epithelial dysplasia: Epithelial dysplasia, a term becoming increasingly referred to as intraepithelial neoplasia, is the sum of various disturbances of epithelial proliferation and differentiation as seen microscopically. Individual cellular features of dysplasia are called epithelial atypia.Oral submucous fibrosisElisha K. Green: Elisha K. Green (1839–1917) was an entrepreneur in Los Angeles, California, who "made a fortune out of windmills" and served for six years on the Common Council, the governing body of that city.Intestinal metaplasia: 200px|right|thumb|Intestinal metaplasia (top middle of image) of the gastric antrum and [[stomach cancer|adenocarcinoma of the stomach (left/centre of image). H&E stain.Cervical screening: Cervical screening is the process of detecting abnormal changes in the cervix before they can develop into cervical cancer. If the abnormal tissue or cells can be removed, then the disease can be prevented from developing.LeukoplakiaAberrant crypt foci: Aberrant crypt foci (ACF) are clusters of abnormal tube-like glands in the lining of the colon and rectum. Aberrant crypt foci form before colorectal polyps and are one of the earliest changes seen in the colon that may lead to cancer.