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Updated: Mar 11, 2026

Modified Octopus Technique for Thoracoabdominal Aortic Aneurysm
Published on: August 1, 2025
Physician-Modified C3 Excluder Endograft as the Preferred Solution to Treat a Juxtarenal Para-Anastomotic Aneurysm
Thibault Couture1, Raphaël Coscas2, Henri Lamas1
1Department of Vascular Surgery, Ambroise Paré University Hospital, Assistance Publique - Hôpitaux de Paris, Boulogne-Billancourt, France; Faculté de Médecine Paris-Ile-de-France Ouest, UFR des sciences de la santé Simone Veil, Université Versailles Saint-Quentin en Yvelines, Montigny-le-Bretonneux, France.
Abstract:
Feasibility and early satisfactory results of physician-modified endografts have been reported. Most reports described the use of Cook Dacron aortic endografts (Cook Medical, Inc., Bloomington, IN). However, in some specific anatomic features (short aortic length, narrow aorta), the use of this device may not be appropriate.We here report a case of juxtarenal aortic aneurysm proximal to a former aortobifemoral graft in a high surgical risk patient. Due to a narrow proximal neck and a short aortic length, a physician-modified Gore C3 Excluder device (W. L. Gore & Associates, Inc., Flagstaff, AR) incorporating a fenestration for a large accessory renal artery was implanted. At 6-month follow-up, the aneurysm remains excluded and computed tomography scan demonstrates patent renal vessels.Surgeon-modified Gore C3 Excluder device implantation is feasible. Because of specific device characteristics (short main body, repositioning ability), it represents a valuable alternative in high-risk patients with juxtarenal aneurysms not amenable to other techniques.

