Chen H.-Y.Chen L.-K.Su C.-T.SHYH-JYE CHENLin C.-H.Tsai Y.-F.Wu C.-C.Peng H.-L.Lu T.-N.2020-07-072020-07-0720020167-9899https://scholars.lib.ntu.edu.tw/handle/123456789/509266Cervical arch is a rare congenital anomally presumed to result from persistence of the third aortic arch and regression of the normal fourth arch. Rather rare is cervical aortic arch associated with aneurysm and obstruction, with eight known cases reported. Definitive diagnosis with a noninvasive imaging modality is desirable and very important to prevent the need for disaster intervention. We present two cases of a pulsatile mass in the left supraclavicular region. Three-dimensional computed tomographic angiography and magnetic resonance angiography clearly showed a left-sided cervical aortic arch (Haughton type D) with arch aneurysm and coarctation (pseudocoarctation).[SDGs]SDG3dacron; gadolinium pentetate; iopromide; politef; adolescent; adult; aneurysm surgery; aorta aneurysm; aorta arch aneurysm; aorta coarctation; aorta graft; aorta surgery; article; blood vessel calcification; brachiocephalic trunk; case report; clavicle; computed tomographic angiography; computed tomography scanner; computer assisted tomography; conservative treatment; contrast enhancement; digital subtraction angiography; disease classification; disease duration; echocardiography; female; follow up; heart auscultation; heart catheterization; human; image analysis; magnetic resonance angiography; postoperative period; subclavian artery; systolic heart murmur; thorax pain; thorax radiography; three dimensional imaging; Adolescent; Adult; Aortic Aneurysm, Thoracic; Aortic Coarctation; Coronary Angiography; Diagnosis, Differential; Female; Humans; Imaging, Three-Dimensional; Magnetic Resonance Angiography; Tomography, X-Ray Computedjournal article10.1023/A:1021155625397125374162-s2.0-0036918174