In a population-based study on patients with oligodontia, WNT10A mutations accounted for 25 % of the cases, and it was shown that all biallelic WNT10A mutations were associated with absence of maxillary and mandibular molars as well as mandibular central incisors but presence of maxillary central incisors [23]. The gene discussed is WNT10A; the disease is Oligodontia.