Split-Hand/foot Malformation 4, also known as split hand-foot malformation 4, is related to split-hand/foot malformation 1 and split hand-foot malformation. An important gene associated with Split-Hand/foot Malformation 4 is TP63 (Tumor Protein P63), and among its related pathways/superpathways are MECP2 and associated Rett syndrome and Validated transcriptional targets of deltaNp63 isoforms. Affiliated tissues include bone and eye, and related phenotypes are split hand and triphalangeal thumb