Epithelial cells, which line the body's surfaces and cavities, can be organized into a multi-layered tissue called squamous epithelium (as in the oesophagus and skin) or a single layer of columnar ...

A precancerous condition called Barrett’s oesophagus is of much interest, because it arises when some cells of the oesophagus take on a new identity — a phenomenon known as metaplasia. If we could ...