Final answer:
The likely diagnosis (dx) in this pathology is coarctation of the aorta, which is a congenital abnormal narrowing of the aorta. Symptoms include difficulty breathing and poor appetite in infants, and dizziness and chest pain in older individuals. Treatment options include surgery or angioplasty.
Step-by-step explanation:
The likely diagnosis (dx) in the context of pathology characterized by the thickening of the tunica media of the aortic arch near the ductus arteriosus is coarctation of the aorta. Coarctation of the aorta is a congenital abnormal narrowing of the aorta that restricts blood flow through the primary systemic artery. Symptoms of this condition include difficulty breathing, poor appetite, and failure to thrive in infants, while older individuals may experience symptoms such as dizziness, fainting, and chest pain.
Treatment for coarctation of the aorta involves surgery to remove the affected region or angioplasty to open the abnormally narrow passageway.