Antonio Nunziata MD, Presenter: Nothing to Disclose

Orlando Catalano, Abstract Co-Author: Nothing to Disclose

Vincenza Granata MD, Abstract Co-Author: Nothing to Disclose

Adolfo Gallipoli MD, Abstract Co-Author: Nothing to Disclose

Sergio Venanzio Setola MD, Abstract Co-Author: Nothing to Disclose

The SCM muscle is a complex anatomic structure, with a central role in neck spaces division. Masses involving the SCM muscle are uncommon and often found incidentally, requiring an adequate knowledge of the key points for differential diagnosis. We illustrate the normal and abnormal US and CDUS findings encountered when imaging the SCM muscle.

Anatomy of the SCM muscle, located obliquely in the superficial layers of the anterior portion of the neck, is first shown. The role of this muscle in the subdivision of neck triangles is highlighted. The US appearance is then depicted. The US findings in a variety of abnormalities are shown, including congenital muscular torcicollis (SCM pseudotumor), hematomas, myositis, hemangiomas, aponeurotic fibrolipomas, hematogenous metastases, and direct tumor involvement.

This exhibit is a pictorial review of the US and color-Doppler findings in a variety of SCM muscle abnormalities.

Nunziata, A, Catalano, O, Granata, V, Gallipoli, A, Setola, S, Ultrasound (US) Imaging of the Sternocleidomastoid (SCM) Muscle: Normal Findings, Abnormalities, and Pitfalls.  Radiological Society of North America 2010 Scientific Assembly and Annual Meeting, November 28 - December 3, 2010 ,Chicago IL. http://archive.rsna.org/2010/9008897.html