EGF signaling is a key pathway involved in vulval patterning. Vulval precursor cell patterning requires input and cooperation between both EGF LIN-3 graded signaling through LET-23 as well as a sequential, subordinate signal involving DSL ligands acting via LIN-12.f02f02f02f02f02f02f02f02f02f02f02f02epidermal growth factor/neuregulin signaling pathwayPW:0000170Pathway OntologyRas mediated signaling pathwayPW:0000525Pathway OntologyEGF/neuregulin signaling pathwayPW:0000170Pathway Ontology18050418PubMedVulval development.WormBook2005Sternberg PW