Snapshot A 2-day-old boy is evaluated in the newborn nursery for a neck deformity. He was born at 39 weeks gestation and was noted at birth to have bilateral clubfeet. On exam, the top of his head is tilted to the left and his chin is rotated to the right. An ultrasound of his neck demonstrates no masses or cysts. His left sternocleidomastoid muscle is dystonically contracted. Introduction Clinical definition login to view 2 more bullets Epidemiology login to view 5 more bullets Etiology login to view 3 more bullets Pathoanatomy login to view 12 more bullets Associated conditions login to view 5 more bullets Presentation Symptoms login to view 3 more bullets Physical exam login to view 3 more bullets Imaging Ultrasound login to view 5 more bullets Differential Congenital neck mass login to view 4 more bullets Atlantoaxial rotatory subluxation login to view 2 more bullets Treatment Conservative physical therapy to stretch affected SCM muscle login to view 2 more bullets Medical login to view 3 more bullets Complications Permanent rotational deformity Positional plagiocephaly login to view 1 more bullet Facial asymmetry