Cancer cell division. Coloured scanning electron micrograph (SEM) of two cancer cells in the final stage of cell division. During this stage, known as cytokinesis, the cells' cytoplasm divides. Here, the cells are joined by a cytoplasmic bridge. These rounded cells have an uneven surface. Typically, cancer cells are large and they divide rapidly in a chaotic manner. Clumps of these cells form tumours which possess the ability to invade and destroy surrounding tissues. Magnification unknown.