Intestine in the lung
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Journal of Biology 2004, 3:10 doi:10.1186/jbiol8Published: 8 June 2004
The phenomenon of metaplasia, in which one tissue type is converted into another, is beginning to be explained in molecular terms. The transformation of lung to intestinal tissue has not previously been described, but it is now reported that it can be brought about by prolonged Wnt signaling in late development.