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Related Experiment Videos

Thoracic actinomycosis: CT features with histopathologic correlation.

Tae Sung Kim1, Joungho Han, Won-Jung Koh

  • 1Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Gangnam-gu, Seoul 135-710, South Korea.

AJR. American Journal of Roentgenology
|December 17, 2005
PubMed
Summary

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Thoracic actinomycosis, a lung infection by Actinomyces israelii, presents distinct CT findings. Key features include air-space consolidation with necrosis and cavities in parenchymal cases, and broncholiths in endobronchial infections.

Area of Science:

  • Pulmonology
  • Infectious Diseases
  • Radiology

Background:

  • Thoracic actinomycosis is a rare, chronic infection.
  • It is caused by Actinomyces israelii, a gram-positive anaerobic bacterium.
  • Diagnosis often relies on imaging and histopathology.

Purpose of the Study:

  • To correlate computed tomography (CT) findings of thoracic actinomycosis with histopathologic results.
  • To describe the characteristic CT features of both parenchymal and endobronchial forms of the disease.

Main Methods:

  • Retrospective review of CT scans from patients diagnosed with thoracic actinomycosis.
  • Correlation of imaging findings with surgical or biopsy-proven histopathology.
  • Analysis of specific CT features such as consolidation, necrosis, cavitation, and broncholiths.

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Main Results:

  • Parenchymal actinomycosis typically shows chronic segmental air-space consolidation.
  • Necrotic, low-attenuation areas and cavity formation are frequent in parenchymal disease.
  • Endobronchial actinomycosis is often associated with infected broncholiths (calcified structures in the airways) and distal obstructive pneumonia.

Conclusions:

  • CT imaging is crucial for diagnosing thoracic actinomycosis.
  • Characteristic CT findings can differentiate between parenchymal and endobronchial forms.
  • The presence of necrotic consolidation, cavities, or broncholiths aids in diagnosis and management.