© 2019, The Author(s), under exclusive licence to The Japan Society of Human Genetics. Since the publication of this article, it has been brought to our attention, that the identified mutation (NM_015277: c.2617 G > A; p.Glu873Lys) is identical with the mutation (NM_001144967: c.2677 G > A; p.Glu893Lys) reported by Broix et al (Nature Genetics 48, 1349–1358, 2016 https://doi.org/10.1038/ng.3676). Therefore the mutation is not novel but recurrent. Accordingly, the word "novel" should be deleted throughout the article including the title. Thus, the title should read "A missense mutation in the HECT domain of NEDD4L identified in a girl with periventricular nodular heterotopia, polymicrogyria, and cleft palate."