Aortic arch anomalies - Vascular ring (Developmental basis)

Images are from Freedom's CHD Textbook of Angiography Vol. II (1997) p.948.
Based on Edwards Hypothetical Double Arch.
Numbers in lower diagram indicate possible sites of regression. Vascular anomalies occur according to the site of regression.

Normal left arch - 1, 7 regress.
Right arch with mirror-image branching - 2,8 regress.
Left arch with aberrant RSCA - 1, 3 regress.
Right arch with aberrant LSCA - 2,6 regresss.
Figure out other vascular anomalies...similarly:
   Double arch - both arches patent
   Double arch with atresia of a segement of left arch
   Double arch with atresia of a segement of right arch
   Left arch with right descending aorta
   Left arch with isolation of RSCA
   Right arch with left ductus (retroesophageal)
   Right arch with isolation of LSCA
   Right arch with aberrant left innominate artery
   Right arch with isolation of left innominate artery

No comments: