In medical terms, aneurysms can be classified as either central or peripheral, with central aneurysms occurring in major vessels like the aorta or pulmonary arteries, while peripheral aneurysms occur in arteries outside of the aorta, often in the legs, neck, or groin.

Central Aneurysms:

Definition:
Aneurysms that arise from major blood vessels, such as the aorta (the body's largest artery) or the pulmonary arteries.

Examples:
Aortic aneurysms: These can be thoracic aortic aneurysms (in the chest) or abdominal aortic aneurysms (in the abdomen).
Pulmonary artery aneurysms: These are less common but can occur in the main pulmonary artery or its major branches.
Cerebral aneurysms (Brain aneurysms): These affect arteries in the brain.

Peripheral Aneurysms:

Definition:
Aneurysms that occur in arteries other than the aorta, often in the legs, neck, or groin.

Examples:
Popliteal artery aneurysms: These occur in the artery behind the knee.
Splenic artery aneurysms: These occur in the artery that supplies blood to the spleen.
Mesenteric artery aneurysms: These affect the artery that transports blood to the intestines.
Carotid artery aneurysms: These occur in the carotid arteries in the neck.

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