Colored scanning electron micrograph of adenocarcinoma cancer in the endometrium. Surface epithelial cells are seen (yellow), with cavities forming the openings of glands. Adenocarcinoma cells are large (green) and proliferative, invading the surface and glands. (? Professors P.M. Motta and S. Makabe, Science Source/Photo Researchers, Inc. Photo reproduced by permission.)