What abnormal finding can be a potential indicator of CMT?

The potential indicator of CMT (Congenital Muscular Torticollis) is abnormal muscle tone. In cases of CMT, it is common to observe tightness or rigidity in the neck muscles on one side, leading to a head tilt or rotation. This abnormal muscle tone can hinder the infant's ability to move their head freely and can also affect their overall muscle development and symmetry in movement patterns.

In contrast, symmetrical movement patterns, consistent visual tracking, and developed neck strength would typically indicate healthy motor function and development. These characteristics would not point to issues associated with CMT but rather suggest that the child is developing normally. Therefore, abnormal muscle tone is the key finding that can raise concerns about the presence of CMT in an infant.