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Mycotic Pseudoaneurysm of the Internal Carotid Artery After a 'Common Cold': A Rare Case Report

Predrag Matić1, Enes Ljatifi1, Igor Atanasijević1

  • 1Vascular Surgery Clinic, Institute for Cardiovascular Diseases Dedinje, Belgrade, Serbia.

Vascular and Endovascular Surgery
|April 21, 2026
PubMed

Insights

This case report details a rare mycotic pseudoaneurysm of the internal carotid artery in an elderly patient. The infection, caused by Pseudomonas oryzihabitans, followed an untreated upper respiratory infection.

Area of Science:

  • Vascular Surgery
  • Infectious Diseases
  • Bacteriology

Background:

  • Mycotic pseudoaneurysms of the extracranial internal carotid artery (ICA) are infrequent and pose significant management challenges.
  • Infections of the upper respiratory tract can, in rare instances, lead to serious complications.
  • The opportunistic bacterium Pseudomonas oryzihabitans is an uncommon cause of vascular infections.

Purpose of the Study:

  • To report a rare case of mycotic pseudoaneurysm of the left internal carotid artery (ICA).
  • To highlight Pseudomonas oryzihabitans as a causative agent in this specific type of vascular infection.
  • To discuss the potential mechanism of pseudoaneurysm formation following an upper respiratory tract infection.

Main Methods:

  • A contrast computed tomography (CT) scan was utilized for diagnosis.
  • Surgical excision of the pseudoaneurysm was performed.
  • Restoration of blood flow was achieved using a saphenous vein graft interposition.

Main Results:

  • A pseudoaneurysm of the left internal carotid artery (ICA) was identified, compressing the laryngeal wall.
  • The infection was microbiologically confirmed to be caused by Pseudomonas oryzihabitans.
  • Successful surgical management with graft interposition was completed.

Conclusions:

  • This is the first reported case of a mycotic pseudoaneurysm of the extracranial ICA caused by Pseudomonas oryzihabitans.
  • The presumed mechanism involves direct bacterial invasion of the arterial wall.
  • Prompt diagnosis and surgical intervention are crucial for managing such rare vascular emergencies.
Keywords:
aneurysmfalseinternal carotid arterylymphadenitismycotic

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