Divided Parietal Bone in Plagiocephaly

Abstract

Supernumerary cranial sutures represent a rare cause of plagiocephaly. In the case of an extra suture dividing the parietal bone, the presenting features are often inconsistent with the typical presentation of deformational or synostotic plagiocephaly. Disagreement exists as to how the presence of this suture affects the shape of the skull. We present a case of a supernumerary suture in the parietal bone leading to plagiocephaly and discuss the role this suture plays in cranial growth.

Unilateral Pterional Polycraniosynostosis Treated with Craniectomy and Helmet Therapy

“…8 The unilateral occurrence of accessory parietal sutures, even when these sutures remain patent, will cause skull asymmetry as there is increased growth perpendicular to the accessory suture, which leads to unequal skull growth between affected and nonaffected sides of the cranial vault. 9 …”