fusiform aneurysm a spindle-shaped aneurysm; see illustration. infected aneurysm one produced by growth of microorganisms (bacteria or fungi) in the vessel wall, or infection arising within a preexisting arteriosclerotic aneurysm.
PSEUDO (DISSECTING) A false or “pseudo-aneurysm” (D) brain aneurysm is an expansion of a blood vessel wall that does not involve all layers of the wall. Most commonly, it involves the outermost layers of the brain artery only, and usually follows injury or tearing of the vessel wall (referred to as a “dissection” or “laceration”).
Saccular cerebral aneurysm Dr Dan J Bell and Dr Donna D'Souza et al. Saccular cerebral aneurysms, also known as berry aneurysms, are intracranial aneurysms with a characteristic rounded shape and account for the vast majority of intracranial aneurysms.