cerebral aneurysm is a bulge in a blood vessel in the brain that can easily rupture, causing bleeding into the brain. This condition progresses very quickly and is life-threatening. However, it is difficult to detect and is usually only detected when the patient undergoes a CT scan for another medical condition.

When bacteria invade, the immune system will fight the infection and cause inflammation at the site of infection, a cavity is created, filled with pus to form an abscess. Abscess sites such as the abdomen or fluid collection in the chest need to be drained out of the body under the guidance of digital subtraction angiography.