A saccular dilatation of a blood vessel caused by a bacterial infection is called

A saccular dilatation of a blood vessel caused by a bacterial infection is called

• A. Mycotic Aneurysm
• B. Fusiform Aneurysm
• C. Saccular
• D. Pseudoaneurysm

Answer: (A)

Infection weakens the vessel wall, leading to a mycotic aneurysm. This term denotes an aneurysm caused by bacterial (or other microbial) infection and often presents as a saccular outpouching on one side of the vessel. The word “mycotic” is historical and refers to infection rather than fungi. If the dilation involves the entire circumference and looks more like a spindle along a segment, that would be a fusiform aneurysm, which is a different shape and not specifically tied to infection. Describing the lesion as saccular conveys shape but not cause, so it doesn’t identify the infectious origin. A pseudoaneurysm, by contrast, is a contained rupture lacking all layers of the arterial wall and is a distinct process from an infectious true aneurysm.

Infection weakens the vessel wall, leading to a mycotic aneurysm. This term denotes an aneurysm caused by bacterial (or other microbial) infection and often presents as a saccular outpouching on one side of the vessel. The word “mycotic” is historical and refers to infection rather than fungi. If the dilation involves the entire circumference and looks more like a spindle along a segment, that would be a fusiform aneurysm, which is a different shape and not specifically tied to infection. Describing the lesion as saccular conveys shape but not cause, so it doesn’t identify the infectious origin. A pseudoaneurysm, by contrast, is a contained rupture lacking all layers of the arterial wall and is a distinct process from an infectious true aneurysm.