Abstract Microcephaly with or without chorioretinopathy, lymphedema or mental retardation is a rare KIF11-related disorder. Here we report the case of a patient with microcephaly, lymphedema, nystagmus and familial exudative vitreoretinopathy carrying a novel de novo KIF11 nonsense variant (NM₀04523. 4: p. Glu123Ter), which is considered pathogenic. This case expands the phenotypic range of KIF11 pathogenic variants and highlights the importance of early ophthalmological evaluation, genetic counseling and family assessment.
Ozaki et al. (Mon,) studied this question.