Syndactyly type I (185900) is an autosomal dominant limb malformation characterized in its classic form by complete or partial webbing between the third and fourth fingers and/or the second and third toes. Malik et al. (2005) classified a subtype of type I syndactyly in which webbing of second and third toes occurs without hand involvement as 'zygodactyly.' [from
OMIM]