Abstract
Treatment of pelvic arteriovenous malformations (AVMs) is frequently challenging because of the complex structures and anatomical diversity among cases. We present a case series of six patients with pelvic AVMs. All patients had a similar anatomical structure consisting of multiple feeders from the unilateral internal iliac artery, collecting into a dilated venous sac in the unilateral paravesical space and draining into a single outflow, eventually joining the pre-prostatic vein or internal iliac vein. Five among these patients were successfully treated by catheter-directed embolo-sclerotherapy. In addition to our six cases, we identified six previous case reports of pelvic AVM with similar anatomical characteristics. Herein, we summarize the clinical and anatomical features of these 12 paravesical AVM cases. In all cases, the patients were men; the AVM was predominantly located at the right paravesical space and demonstrated good therapeutic effect of catheter-directed embolosclerotherapy. These paravesical AVMs may constitute a new subgroup of pelvic vascular anomalies with the same etiology that are treatable by adequate catheter intervention.
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All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Owing to the retrospective study design, ethical approval was not sought from our institutional review board for this study. Informed consent was obtained from all individual participants included in this study.
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Kishino, M., Nishida, K., Kimura, K. et al. Paravesical space arteriovenous malformation as a specific subgroup of pelvic vascular anomaly: a case series and review of literature. Jpn J Radiol 38, 434–439 (2020). https://doi.org/10.1007/s11604-020-00924-6
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DOI: https://doi.org/10.1007/s11604-020-00924-6