Vein of Galen aneurysmal malformation

Case contributed by Antonio Rodrigues de Aguiar Neto
Diagnosis certain


This patient came to the hospital to investigate a cerebrovascular malformation found in a previous examination from another institution. The patient underwent surgery to correct an atrial septal defect at seven months of age.

Patient Data

Age: 2 years
Gender: Female

The magnetic resonance Imaging (MRI) and MR angiography revealed a complex vascular anomaly consistent with a vein of Galen malformation (VGAM). The VGAM exhibits aneurysmal dilatation of the vein of Galen measuring 3.0 x 1.8 cm, with abnormal arterial choroidal and thalamoperforating feeders, forming clusters of tortuous dilated vessels. These vessels converge directly towards the vein of Galen without an intervening nidus, indicative of an arteriovenous fistula. The vein of Galeno drainage is via a prominent straight sinus to the torcula of Herophili and superior sagittal sinus.


These MRI findings clearly show a vascular anomaly consistent with a vein of Galen malformation.

Case Discussion

Vein of Galen aneurysmal malformations (VGAM) are congenital conditions characterized by aneurysmal dilatation of the vein of Galen 1-4. This condition tends to present during early childhood with clinical manifestations of left-to-right and high-output cardiac failure 1-4. Imaging plays an essential role by providing the information necessary for managing VGAM 1-4

Case courtesy

  • João Emanuel Nascimento, MD – radiology resident, PGY-3, Department of Radiology

  • Antonio Rodrigues de Aguiar Neto, MD - radiologist, Department of Radiology

Hospital da Restauração – Recife, PE – Brazil

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.