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Fig. 6A. —Muscles of mastication in 7-year-old girl with left hemifacial microsomia. Axial CT scan shows normal right masseter muscle (straight arrow) and medial pterygoid muscle (arrowhead) compared with hypoplastic left medial pterygoid muscle (wavy arrow) and essentially absent masseter muscle. Patient has complex segmentation anomalies of cervical spine resulting in left convex scoliosis and eccentric position of dens relative to anterior arch of C1. These vertebral anomalies, which are traditionally associated with Goldenhar's syndrome, are now generally considered part of spectrum of findings associated with hemifacial microsomia.