Mutations in the gene encoding the Wnt-signaling component R-spondin 4 (RSPO4) cause autosomal recessive anonychia.
American Journal Of Human Genetics
Bergmann, C C; Senderek, J J; Anhuf, D D; Thiel, C T CT; Ekici, A B AB; Poblete-Gutierrez, P P; van Steensel, M M; Seelow, D D; Nürnberg, G G; Schild, H H HH; Nürnberg, P P; Reis, A A; Frank, J J; Zerres, K K