Wellcome Images

A clump of breast cancer cells. The blue cells are actively growing, whereas the yellow ones are in the process of dying by programmed cell death (apoptosis) in the same way as the prostate cancer cells in the adjacent image. The many factors involved in the development of cancers can affect cells in different organs in the generally the same ways to cause similar effects in different cell types.
Colour-enhanced scanning electron micrograph by Dave McCarthy and Annie Cavanagh.
B0006422