Related Experiment Video
Updated: Jun 24, 2026

08:25
Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling
Published on: April 7, 2015
Para-aortic arch abscess secondary to Staphylococcus aureus pneumonia
Karen K Koo1, Jack C J Sun, Richard P Whitlock
1Department of Critical Care Medicine, McMaster University, Hamilton, Canada.
The Canadian Journal of Cardiology
|April 3, 2009
Summary
Community-acquired Staphylococcus aureus pneumonia can lead to rare complications. A para-aortic abscess, a previously unreported complication, was successfully treated non-surgically.
Area of Science:
- Infectious Diseases
- Radiology
- Internal Medicine
Background:
- Staphylococcus aureus is a common cause of pneumonia across various healthcare settings.
- Pneumonia, while often uncomplicated, can lead to severe outcomes, particularly in vulnerable populations.
- The development of extrathoracic complications from S. aureus pneumonia is uncommon.
Observation:
- A case report details a patient who developed a para-aortic abscess following community-acquired Staphylococcus aureus pneumonia.
- Diagnostic imaging modalities were crucial in identifying this rare complication.
- The abscess is hypothesized to stem from suppurative lymphadenitis in mediastinal lymph nodes.
Findings:
- This represents the first reported instance of a para-aortic abscess secondary to S. aureus pneumonia.
- The complication likely arose from infected lymph nodes (station 5 or 6).
- Successful non-surgical management was achieved.
Implications:
- Highlights the potential for unusual metastatic complications from S. aureus pneumonia.
- Underscores the importance of advanced imaging in diagnosing complex infectious sequelae.
- Demonstrates the efficacy of conservative, image-guided treatment for such rare abscesses.
Related Concept Videos
Brain Abscess l: Introduction
A brain abscess is a focal, intracerebral infection characterized by a localized collection of pus within the brain parenchyma, resulting from microbial invasion and the body’s inflammatory response. It progresses through stages: early and late cerebritis, followed by early and late capsule formation, reflecting tissue destruction, immune response, and eventual encapsulation.Etiology and PathogenesisCausative organisms vary with source and host factors, often involving polymicrobial infections,...
Staphylococcal Skin Infections
Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
Aneurysm II: Clinical Manifestations and Diagnostic Studies
Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
Pneumonia I: Introduction
Pneumonia is an infection of the lower respiratory tract that leads to inflammation of the lung parenchyma, often resulting in the accumulation of inflammatory exudate in the alveoli and airways. Unlike the watery, low-protein fluid exudate in pulmonary edema, the exudate in this case is a thick fluid rich in immune cells, proteins, and debris produced during infection and inflammation.This impairs gas exchange and can lead to consolidation of lung tissue. The infection may be caused by a...
Aneurysm III: Interprofessional Care
Aneurysm management involves either conservative medical therapy or surgical intervention, depending on the size and symptoms of the aneurysm. Conservative management is generally reserved for smaller, asymptomatic aneurysms, while larger or symptomatic aneurysms often necessitate surgical repair.Conservative Medical TherapyFor small, asymptomatic aneurysms, particularly abdominal aortic aneurysms (AAA) less than 5.5 centimeters in diameter, conservative medical therapy is recommended. This...
Mechanism of Antibiotic Resistance in MRSA
Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...