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Lateral thoracic artery aneurysm with lung abscess and empyema caused by Streptococcus intermedius

Tatsuya Fujihara1, Naoya Itoh2, Shuhei Yamamoto3

  • 1Division of Emergency and Critical Care Department Shimane Prefectural Central Hospital Izumo Japan.

Journal of General and Family Medicine
|September 6, 2021
PubMed

Insights

A lung abscess caused by Streptococcus intermedius can lead to a potentially fatal pseudoaneurysm. This rare complication involves bacteria invading the vascular wall, causing lethal hemorrhage.

Area of Science:

  • Medicine
  • Infectious Diseases
  • Pulmonology

Background:

  • Lung abscesses are localized collections of pus within the lung parenchyma.
  • Streptococcus intermedius is a bacterium that can cause various infections.
  • Pseudoaneurysms are abnormal dilatations of a blood vessel wall.

Purpose of the Study:

  • To report a rare case of pseudoaneurysm associated with a lung abscess.
  • To highlight the potential for Streptococcus intermedius to cause vascular invasion and hemorrhage.

Main Methods:

  • Case report review.
  • Microbiological analysis of causative agent.
  • Radiological imaging to identify pseudoaneurysm.

Main Results:

  • A patient presented with a lung abscess.
  • Streptococcus intermedius was identified as the causative pathogen.
  • A pseudoaneurysm was diagnosed in association with the lung abscess.
  • Evidence of vascular wall invasion by bacteria was noted.

Conclusions:

  • Streptococcus intermedius can cause severe complications such as pseudoaneurysms.
  • Infection-associated pseudoaneurysms require prompt diagnosis and management.
  • Early recognition of this complication is crucial to prevent potentially lethal hemorrhage.
Keywords:
emergency medicinehospital general medicineinfectious diseases

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