A case of the anomalous intercostal, subcostal and lumbar arteries in man

This report describes an anomalous case of the multiple ipsilateral common trunk formation in the parietal arteries encountered during observed in the dissection of a 71 year-old Japanese female cadaver in the anatomical laboratory of Kanazawa Medical University. This subject had thirteen parietal arteries. Among the thirteen parietal arteries two arose from both the subclavian arteries (superior intercostal artery), and eleven arose from the descending aorta (aortic parietal arteries). Five arteries (R-1-R-5) were located on the right side, and eight (L-1-L-8) on the left. Of the eleven aortic parietal arteries, nine formed the ipsilateral common trunk, and the other two were independent branches (left 11th intercostal and 2nd lumbar arteries). The branching states of these parietal arteries were as follows: on the right side, R-1 was the common trunk for the 1st and 2nd intercostal arteries (the right superior intercostal artery), R-2 (was the common trunk) for the 3rd, 4th, 5th, 6th and 7th intercostal arteries, R-3 for the 8th and 9th intercostal arteries, R-4 for the 10th and 11th intercostal arteries and R-5 for the subcostal, 1st, 2nd, 3rd and 4th lumbar arteries. On the left side, L-1 was the common trunk for the 1st and 2nd intercostal arteries (the left superior intercostal artery), L-2 for the 3rd, 4th and 5th intercostal arteries, L-3 for the 6th and 7th intercostal arteries, L-4 for the 8th, 9th and 10th intercostal arteries, L-6 for the subcostal and 1st lumbar arteries, and L-8 for the 3rd and 4th lumbar arteries.(ABSTRACT TRUNCATED AT 250 WORDS)