Management of splenic and/or hepatic pseudoaneurysm following abdominal trauma in pediatric patients.

INTRODUCTION Splenic and hepatic pseudoaneurysm (PA) is a rare arteriovenous injury that may occur following abdominal trauma. The most frequent complication of PA is late rupture, which can lead to hemodynamic instability. The objective of this study was to describe our experience in the management of visceral PA. MATERIAL AND METHODS A retrospective study of patients under 15 years of age with blunt abdominal trauma associated with splenic and/or hepatic injury treated from 2012 to 2020 was carried out. PA formation and management were analyzed. All patients underwent CT-scan, which allowed trauma grade to be established, and also control contrast-enhanced ultrasonography (CEUS) in the first week following trauma. If PA was confirmed, angiography ± percutaneous embolization were performed. RESULTS A total of 32 patients with blunt trauma were included. Mean age was 8.7 ± 3.2 years (2-15 years). 68.7% (n = 22) of patients were male. Median trauma grade was grade III (grades II-IV). 33.3% (n = 5/15) of patients developed splenic PA, and 5.8% (n = 1/17) of patients developed hepatic PA, with mean diagnostic time being 3.7 ± 3 (3-8) days. PA formation was associated with higher severity scores, with a mean difference of 15.6 ± 5.3 (95% CI: 4.37:26.14 p < 0.008). All PA cases - except for one, which required urgent splenectomy - were treated with embolization (85.7%) (n = 5/6). CONCLUSION Visceral PA is underdiagnosed, with an incidence higher than reported. Imaging studies (CEUS) are required prior to discharge in the presence of severe trauma. Treatment remains controversial, but we recommend percutaneous embolization, with splenectomy being reserved for unstable patients.