Subsequent genetic screens identified at least seven additional tumor suppressors whose biological functions converge on Hpo and/or Wts: the FERM domain proteins Merlin (Mer) and Expanded (Ex) [7–10], the protocadherins Fat (Ft) [11–14] and Dachsous (Ds) [15, 16], the CK1 family kinase Disc overgrown (Dco) [17, 18], the WW and C2 domain-containing protein Kibra [19–21], and the apical transmembrane protein Crumbs (Crb) [22–24]. This evidence concerns the gene GFER and neoplasm.