Giant intrathoracic mycotic aneurysm of left subclavian artery

Mycotic subclavian artery aneurysms: a scoping review

Introduction

Mycotic subclavian artery aneurysms (SAAs) are a very rare disorder.

Aim

To provide an overview of current knowledge on clinical features, management strategies and outcome evaluations of mycotic SAAs.

Material and methods

The study materials were based on comprehensive literature retrieval of publications of mycotic SAAs published between 2000 and 2023.

Results

Contaminated mechanical injuries and abscess erosions of the arterial walls are mechanisms of mycotic SAAs. The diagnosis relies on detection of pathogenic microorganisms by cultures or microbiological investigations of blood, other fluids and infected tissues as well as medical imaging visualization. The indications for an interventional therapy were poor general condition, high surgical risk, and rescue exclusion for a ruptured pseudoaneurysm. Three (9.1%) pre-treatment deaths were a result of sudden rupture of the mycotic SAAs and thus they lost the opportunity of treatment. All post-treatment deaths occurred in the interventional patient group, whereas the causes of death seemed to be unrelated to mycotic SAAs per se or to treatments of choice. Patient outcome evaluations revealed no significant difference between different treatments of choice. No significant predictive risk factors were responsible for patient outcomes.

Conclusions

Once a diagnosis of mycotic SAA is made, sensitive antibacterial drugs are applied immediately to control the infection and control aneurysmal progression. Early treatment is conducted as soon as possible to avoid aneurysmal rupture. A decision on treatment of choice is made based on the patient's specific condition. Antibacterial drug use is continued for about 6 weeks after surgical or interventional therapy.

Subclavian artery aneurysms: management implications in a resource-limited setting

Subclavian artery (SA) aneurysms (SCAA) are relatively uncommon but carry a significant risk of rupture, thrombosis and embolism if left untreated. We describe the etiology, mode of presentation and outcome of surgical management of 10 patients presenting with SCAA between January 1990 and December 2010. The mean age was 43.7 years. There were seven men and three women. Five patients had aneurysms due to trauma, four had it due to thoracic outlet syndrome and one had it secondary to atherosclerosis. Five patients presented with ischemic symptoms of the distal upper extremity, while the rest presented with a pulsatile neck mass. All patients were treated surgically. Six patients were approached with combined supra- and infraclavicular incisions. Aneurysm resection with reconstruction using saphenous vein or synthetic grafts was done in eight patients. There was no perioperative mortality. The early patency rate was 100%. Surgical treatment is effective and recommended for most patients with SCAA.