RESUMENPresentamos un caso ilustre extremadamente infrecuente de un paciente de 51 años que se presentó con un cuadro clínico neurológico progresivo, en quien se diagnosticó un aneurisma serpentina (AS) gigante parcialmente trombosado y que se realizó tratamiento endovascular. ABSTRACTWe report an extremely rare case of a patient illustrious 51 year-old who presented a progressive neurological symptoms, in which a giant partially thrombosed serpentine aneurysm (AS) was diagnosed and then an endovascular treatment performed to occlude the aneurysm.