Department of General Surgery, Dr. D. Y. Patil Medical College, Hospital and Research Centre, Pune, Maharashtra, India.
Ann Afr Med. 2024 Jul 1;23(3):505-508. doi: 10.4103/aam.aam_162_22. Epub 2024 Jun 7.
A persistent sciatic artery (PSA) is a rare congenital vascular anomaly with an extremely low incidence of about 0.04%-0.06%. It is due to the persistence of the embryological axial limb artery, representing a continuation of the internal iliac artery into the thigh through the greater sciatic foramen below the piriformis muscle and down the thigh alongside the sciatic nerve. In normal embryologic development of the lower limb, the axial artery normally regresses after week 12. Persistent sciatic artery is often asymptomatic until a complication develops, it can be classified into two types, complete and incomplete. PSA can cause serious lower limb complications such as acute or critical limb ischemia.
持续性臀下动脉（PSA）是一种罕见的先天性血管畸形，其发病率极低，约为 0.04%-0.06%。它是由于胚胎轴向肢体动脉的持续存在，代表了髂内动脉通过梨状肌下方的大坐骨孔延续到大腿，并沿着坐骨神经向下延伸到大腿。在下肢的正常胚胎发育过程中，轴向动脉通常在第 12 周后退化。持续性臀下动脉通常在出现并发症之前无症状，但可分为完全型和不完全型。PSA 可引起严重的下肢并发症，如急性或临界肢体缺血。
