This volume details a comprehensive range of methods for imaging  epithelial-to-mesechymal transition (EMT)/MET in in vivo systems, and methods to leverage these systems to dissect the underlying mechanisms. Chapters guide readers through studying different features of epithelial-mesenchymal plasticity, past and future research of the EMT, in vivo systems, and in vivo imaging. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls.