Mycotic Aneurysm

A mycotic aneurysm is an infected aneurysm and is also called microbial arteritis based on the mushroom or fungus-like morphology. Mycotic aneurysms are generally caused by a bacterial infection (such as Staphylococcus aureus or Streptococcus viridans) within the wall of the artery. It is a common complication of the hematogenous spread of bacterial infection. This bacterial infection subsequently causes the arterial wall to weaken and bulge outward.

The abdominal aorta is the most common site for an arterial aneurysm. A true aneurysm is the result of a sac that has formed on the arterial wall with at least one unbroken layer. It is most often associated with atherosclerosis. A false aneurysm is usually caused by trauma. In this case, the wall of the blood vessel is ruptured, and blood escapes into surrounding tissues and forms a clot. Because of pressure within the clot arising from the heart's contractions, the clot often pulsates against the examiner's hand as does a true aneurysm.

Mycotic Aneurysm Symptoms

Aneurysms tend to increase in size, which presents a problem of increasing pressure against adjacent tissues and organs, and a danger of rupture exists. When an aneurysm does rupture, a critical situation follows. The person with a ruptured aortic aneurysm will exhibit severe pain and there will be a loss of blood that will lead to shock. A ruptured cerebral aneurysm will produce neurologic symptoms and can resemble the clinical picture of stroke syndrome.

Getting Diagnosed

Our team of specialists provide thorough neurological evaluations using the latest diagnostic technology including CT angiography and 3-D angiography.

We work very closely with the departments of Neurosurgery, Interventional Neuroradiology, Neurology and Radiation Oncology, as well as the Neurocritical Care Center and Stroke Center to ensure an accurate diagnosis and the appropriate treatment for the best outcome.

Your Path to Health and Wellness Starts Here

The Brain Aneurysm Center and Cerebrovascular Surgery and Endovascular Neurosurgery Center of Northwell Health Neuroscience Institute combines advanced technical knowledge and cutting-edge procedures for diagnosing and treating arteriovenous malformations, ruptured and non-ruptured aneurysms, carotid artery dissection and related conditions.


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The Neuroscience Institute

We are dedicated to the world-class diagnosis and treatment of neurological diseases and disorders.