case_images: PMC9293487_01
case_images: (
  A
  ) Cervical rib with subclavian artery and middle and inferior trunks overlying following anterior scalenotomy. (
  B
  ) Blue dash line indicating insertion of anterior scalene to cervical rib.
case_images: 10-1055-s-0042-1753541-i2200005-1.jpg
case_images: PMC9293487_01_10-1055-s-0042-1753541-i2200005-1.jpg
case_images: FI2200005-1
case_images: All were unremarkable except for the finding of a supernumerary C8 vertebra with bilateral cervical ribs arising from this C8, with the right larger than left ( Fig. 1A, B ). 
case_images: Cervical spine computed tomography (CT) demonstrating C8 vertebrae with bilateral ribs, right larger than left. (
  A
  ) Anterior view. (
  B
  ) Superior view.
case_images: 10-1055-s-0042-1753541-i2200005-2.jpg
case_images: PMC9293487_01_10-1055-s-0042-1753541-i2200005-2.jpg
case_images: FI2200005-2
case_images: This was done via a supraclavicular approach ( Fig. 2A, B ).
case_images: Portions of resected cervical rib and first rib as labeled.
case_images: 10-1055-s-0042-1753541-i2200005-3.jpg
case_images: PMC9293487_01_10-1055-s-0042-1753541-i2200005-3.jpg
case_images: FI2200005-3
case_images: The scalenus medius insertion was therefore released off the first rib and the relevant portion of this rib was segmentally resected to decompress the costoclavicular impingement ( Fig. 3 ).