Aneurysmal malformation of the vein of Galen (AVG) is a rare congenital vascular malformation, characterized by the dilation of an embryonic vein precursor of the vein of Galen. It is more common in boys. We report the case of an observation of AVG collected in the radiology and medical imaging department of the Medical Clinic in Bamako, Mali. CT scan was used to make the diagnosis. It was a 28-year-old young man with epileptic seizures and severe headache whose cerebral CT angiography had shown aneurysmal dilation of the vein of Galen and venous sinuses. In light of this observation, we bring you the contribution of CT angiography in the management of this pathology.