Congenital torticollis caused by unilateral absence of the sternocleidomastoid muscle.
Congenital torticollis is most commonly caused by benign fibrosis of the sternocleidomastoid muscle. Absence of the sternocleidomastoid muscle is a rare cause of congenital torticollis. There have been fewer than a dozen reported cases of agenesis of the sternocleidomastoid muscle. We describe a case of congenital absence of the sternocleidomastoid diagnosed by US and confirmed on MRI.
Raman
Subha
S
Department of Radiology, UMass Memorial Medical Center, S2-824, (affiliated with the University of Massachusetts Medical School), 55 Lake Avenue North, Worcester, MA 01655, USA. subharaman73@yahoo.com
Takhtani
Deepak
D
Wallace
E Christine
EC
D003937:Diagnosis, Differential; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D009334:Neck Muscles / Q000002:abnormalities*; D014103:Torticollis / Q000151:congenital* / Q000175:diagnosis* / Q000209:etiology; D014463:Ultrasonography