Craniosynostosis, Herrmann-Opitz type is a rare bone development disorder characterized by intellectual disability, short stature, turribrachycephaly, facial dysmorphism (i.e. severe hypertelorism, hypoplasia of supraorbital ridges, abnormal ears, and micrognathia), bony defects of the occiput, and digital anomalies (incl. syndactyly, oligodactyly, and/or brachydactyly). Urethral atresia has also been reported. There have been no further descriptions in the literature since 1987.

Digits that appear disproportionately short compared to the hand/foot. The word brachydactyly is used here to describe a series distinct patterns of shortened digits (brachydactyly types A-E). This is the sense used here.