A pseudoaneurysm, also known as a false aneurysm, is an outpouching of a blood vessel, involving a defect in the 2 innermost layer (tunica intima and media) with continuity of the outermost layer (adventia). Alternatively, all three layers are damaged and the bleeding is contained by a blood clot or surrounding structures.

Femoral pseudoaneurysms may complicate up to 8% of vascular interventional procedures. Small pseudoaneurysms can spontaneously clot, while others need definitive treatment. Surgery is considered the gold-standard treatment, although is not without risk in patients with severe cardiovascular disease. Less invasive treatment options, such as Duplex ultrasound-guided compression and percutaneous thrombin injection are available, however, evidence of their efficacy is limited. {{med-stub}

Anatomical pathology

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