Traumatic aneurysm and arteriovenous fistula of the splenic artery.

Aneurysmal arteriovenous fistulas are rare and mostly seen in adults. A 13-year-old girl developed a subcapsular hematoma of the spleen following blunt abdominal trauma. Follow-up ultrasonography 4 months after the trauma revealed an aneurysm at the splenic hilum. Selective splenic angiography demonstrated the lesion to be an aneurysmal arteriovenous fistula. Repeat ultrasonography enabled us to be certain of the traumatic origin of the aneurysm and arteriovenous fistula which are very unusual in the pediatric age group.