FGF9 and Hepatic fibrosis: Lee et al. present data on caveolin-1 regulating bone marrow derived pro-fibrotic cells in skin fibrosis; Peng et al. report on the role and regulation of the fibroblast growth factor 9 (FGF9 pathway in the experimental fibrotic lung; and Ahsan and Mehal describe the importance of a component of the adenosine pathway in liver fibrosis.