Uterine Artery Embolization for Leiomyoma in Patient with Absent Unilateral Internal Iliac Artery Due to Previous Kidney Transplantation: Embolization via Lumbar Artery Collaterals

Introduction: Uterine artery embolization (UAE) is a well-established treatment option for symptomatic uterine leiomyomas. In cases where the internal iliac artery, from which the uterine artery normally originates, is ligated, blood flow to the uterus can be preserved through various collateral vessels. Here, we report a case of a 44-year-old patient who underwent UAE via collateral branches of the right lumbar artery due to a history of kidney transplantation. Case Presentation: A 44-year-old patient was referred for UAE for leiomyomas. She had a history of kidney transplantation with right internal iliac artery to graft renal artery anastomosis performed using the end-to-end method. The right uterine artery was successfully embolized through collaterals from the right lumbar artery, resulting in a positive outcome. Conclusion: We present a case in which collateral circulation was recruited during UAE in a patient with absent unilateral internal iliac artery flow due to prior kidney transplantation.