fa Morphometry Morphometry Original Original <strong>Purpose:</strong> Several variations of aortic arch have been reported yet. In present study another variation of aortic arch was reported. Right subclavian artery arises from posterior surface of the distal end of the aortic arch. <strong>Case Report</strong>: we present a variation of an aorticarch in which right subclavian artery arisesfrom posterior surface of the distal end of the aortic arch and passing behind esophagus to reach right side of neck. <strong>Conclusion</strong>: Review of literature showed that regarding origin of the artery this variation was reported for&nbsp; the first time by the authors . It seems that the artery narrowed the position the esophagus.&nbsp;However, there were not any other sign of side effect on anatomical structure and of their blood supply.&nbsp; Anatomy, Variation, Aortic Arch, Subclavian Artery 0 0 http://anatomyjournal.ir/browse.php?a_code=A-10-304-253&slc_lang=fa&sid=1 Rafat Lalouie 10031947532846005899 10031947532846005899 No Mohammad Bayat 10031947532846005900 10031947532846005900 Yes Hossein Hekmat 10031947532846005901 10031947532846005901 No Mohsen Norouzian 10031947532846005902 10031947532846005902 No Reza Mastari Farahani 10031947532846005903 10031947532846005903 No Mohammad Reza Jalili 10031947532846005904 10031947532846005904 No Shabnam Abdi 10031947532846005905 10031947532846005905 No Mohammad Amin Abdollahi 10031947532846005906 10031947532846005906 No Yousef Sadeghi 10031947532846005907 10031947532846005907 No