Vascular diseases, like brain aneurysms and arteriovenous malformations (AVMs), affect the blood vessels in our bodies. Think of blood vessels as highways that carry blood to and from different parts of our body, including the brain. A brain aneurysm is like a weak spot or bulge in one of these blood vessels, while an AVM is a tangle of abnormal blood vessels. These conditions can be dangerous because they may burst or cause problems with blood flow in the brain, leading to serious health issues. Understanding them is crucial for early detection and proper treatment.