Traumatic Meningocele

1-month-old female with history of left upper extremity weakness and decreased range of motion. These images demonstrate well circumscribed ovoid T2/STIR hyperintense lesions at the C7-T1 and T1-T2 disc levels on the left. On the high resolution images, there are no traversing nerve roots at those levels. There is displacement of the left lateral dural margin towards the midline on the axial images. The findings are most compatible with traumatic meningoceles secondary to nerve root avulsion in the setting of macrosomia and birth dystocia. Nerve root avulsion in the lower cervical and upper thoracic spinal region between the levels of C5 and T1 will manifest as a brachial plexus injury clinically. Avulsion is typically result from severe traction forces exerted on the upper limb. Patients typically present with complete or partial motor paralysis. The most common cause of brachial plexus injury are motor vehicle accidents with other causes related to birth trauma, work accidents, sport injuries, incision and gunshot wounds, and patient malpositioning during surgery.