[Anterior optic pathways compression by a surgical clip mobilized by delayed chronic hydrocephalus after treatment of a ruptured anterior communicating artery aneurysm].

Chronic hydrocephalus is a classic and recognized complication that affects 6 to 37% of patients with aneurysmal subarachnoid haemorrhage. The diagnosis is often mentioned due to the delayed onset of gait disturbance and slower psychomotor performance. The CT-scan confirms the diagnosis by showing an enlargement of the ventricles. In case of symptomatic hydrocephalus, a ventriculo-peritoneal shunt is often required. The authors report a rare case of chronic hydrocephalus presenting with visual symptoms, due to the delayed mobilisation of a surgical clip with direct mass effect over the anterior optic pathways. The treatment of hydrocephalus led to a rapid and complete regression of symptoms.