Cancer stem cells

Scientists have found new evidence for a theory about why some cancers return after they’ve seemingly been wiped out.

Three studies in mice say tumours contain a pool of cancer stem cells that can multiply and seed the re-growth.

If that’s true, scientists will need to find a way to kill those stem cells, apart from how they attack the rest of the tumour.

Researchers have been finding signs of this stem cell theory for about a decade.