• An aneurysm is a pathological dilation of a section of vasculature or heart. A variety of clinically important aneurysmal subtypes are discussed below distinguished by their anatomical location or pathogenic mechanism.
  • True vs Pseudo
    • True Aneurysms are bounded by all three layers of the blood vessel, meaning the tunica, media, adventitia
    • Psuedo-Aneurysms are generated when blood dissects into the vascular wall itself and may be bounded only by the tunica adventitia or by a perivascular thrombus
  • Fusiform vs Saccular
    • Fusiform aneurysms appear as symmetric dilations of the blood vessel
    • Saccular aneurysms arise from focal defects of the vessel wall and thus manifest as local outpouchings
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