Letter to the Editor

Antenatal Diagnosis of an Extrahepatic Portal Vein Aneurysm

Authors: Raquel Gomez, MD, Danielle M. Bentsen, MD, Randall S. Burd, MD, PhD

Abstract

We are writing to report an infant antenatally diagnosed with an extrahepatic portal vein aneurysm. A healthy 30-year-old female underwent an antenatal sonogram at 34 weeks' gestation. A large flowing vessel was noted near the midline, in proximity to the caudate lobe of the liver. Following an otherwise unremarkable pregnancy, a boy weighing 3,145 g was born via repeat cesarean section at 39 weeks' gestation. At birth, the physical examination was normal. Physiologic jaundice resolved without treatment. An abdominal sonogram performed on the first day of life showed a portal vein aneurysm at the junction of the splenic and superior mesenteric veins measuring 1.5 × 0.8 cm, with venous flow confirmed by color flow and duplex Doppler sonography. The infant underwent a follow-up study at one month and at one year, showing no change in the size of the aneurysm. The child remains asymptomatic.

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