A breast cancer cell, photographed by a scanning electron microscope, which produces a 3-dimensional images. The overall shape of the cell's surface at a very high magnification. Cancer cells are best identified by internal details, but research with a scanning electron microscope can show how cells respond in changing environments and can show mapping distribution of binding sites of hormones and other biological molecules. This image is in the public domain and can be freely reused. Please credit the source and/or author listed above.