Craniofacial microsomia is a congenital facial malformation that commonly results in a decrease in the size of one or both sides of the mandible.  The Pruzansky classification (1) and its 1998 modification by Kaban et al (2) is how plastic surgeons have classified and communicated the mandibular deformity in these patients almost universally.  However, as technologies for imaging have changed, so has our understanding of this mandibular problem.  In their PRS Global Open article from January 2016, Drs. Swanson et al suggest an updated classification system that leverages current 3D-CT scan technology. (3)