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The similarities between the human and mouse genomes often allow researchers to make accurate predictions about the roles of their human counterparts. Because of the similar physiology between these two mammals, mice are used extensively in the laboratory to investigate the mechanisms of human diseases. Furthermore, mice provide us with the option of testing the toxicity of drugs and the safety of therapeutic approaches prior to human application. Here, we review the existing mouse models involving the keratin genes (K6a, K6b, K16, and K17) that cause the human genetic disorder pachyonychia congenita (PC). We also suggest methods to more accurately model this autosomal dominant skin condition in the mouse in order to better understand the pathophysiological processes underlying PC and importantly, provide a test-bed for testing emerging therapies in vivo. [ABSTRACT FROM AUTHOR]