What is a characteristic feature of SCM nodule torticollis?

A characteristic feature of SCM nodule torticollis is the presence of a palpable nodule or band in the sternocleidomastoid (SCM) muscle. This condition, also known as congenital muscular torticollis, often involves the formation of a fibrous mass within the SCM, which can lead to neck stiffness and abnormal head positioning. The nodule is a result of muscle shortening or fibrosis, and it can often be felt during a physical examination.

In this condition, the muscle's tightness often leads to a head tilt, where the head leans toward the affected side while the chin points in the opposite direction. Understanding this feature is crucial for diagnosing and developing an effective treatment plan for individuals with torticollis. Recognizing the nodule can also help differentiate SCM nodule torticollis from other forms of torticollis that do not involve similar muscular changes.