Witkop Syndrome, also known as tooth and nail syndrome, is related to ectodermal dysplasia 8, hair/tooth/nail type and tooth agenesis, and has symptoms including koilonychia An important gene associated with Witkop Syndrome is MSX1 (Msh Homeobox 1), and among its related pathways/superpathways are Signaling by WNT and ncRNAs involved in Wnt signaling in hepatocellular carcinoma. Affiliated tissues include skin and bone, and related phenotypes are abnormality of the dentition and abnormality of the nail