PMC3560263_01
Dissection of left side of the thorax showing circular intercostal space intervening between second and third intercostal spaces, encircled by bifid third rib and bifid third costal cartilage. CIS, circular intercostal space; 2IC, second intercostal space; 3CC third costal cartilage; 3IC, third intercostal space; 3R, third rib.
1752-1947-7-6-1.jpg
PMC3560263_01_1752-1947-7-6-1.jpg
F1
Hence there were two costochondral junctions instead of one (Figure 1).