Figure 2From: Compression of the lower trunk of the brachial plexus by a cervical rib in two adolescent girls: case reports and surgical treatment Case 1: (A-B) MRI T1-weighted coronal images showing that the space between the cervical rib (arrow) and the first rib (arrow head) diminishes upon lifting the upper arm with subsequent impingement of the brachial plexus in image B.Back to article page