In recent years, a new type of surgical technique has been developed for patients with a brain haemorrhage. This operation does not involve a skull exposure, but keyhole surgery through a small hole in the skull. This is called minimally invasive endoscopy-guided surgery. The blood is sucked out through that small hole. Recent research shows that this procedure is safe and that it succeeds in removing on average almost 80% of the brain haemorrhage. The operation must be performed within eight hours of the first symptoms. There are indications that this procedure may also lead to an improvement in functioning after a brain haemorrhage.