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Related Experiment Videos

[A computed tomography-based study of features developmental patterns: Mycobacterium avium complex without

H Kawamoto1

  • 1Department of Clinical Laboratory Medicine, Hiroshima University, School of Medicine, Japan.

Nihon Kokyuki Gakkai Zasshi = the Journal of the Japanese Respiratory Society
|January 23, 1999
PubMed
Summary

Computed tomographic (CT) features of Mycobacterium avium complex (MAC) disease show distinct patterns. Early centrilobular abnormalities progress to consolidation and bronchiectasis, aiding in disease staging.

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Area of Science:

  • Radiology
  • Infectious Diseases
  • Pulmonology

Background:

  • Mycobacterium avium complex (MAC) disease is an opportunistic infection.
  • Understanding the imaging features of MAC disease is crucial for early diagnosis and management.
  • Computed tomography (CT) plays a vital role in characterizing pulmonary infections.

Purpose of the Study:

  • To identify the characteristic computed tomographic (CT) features of Mycobacterium avium complex (MAC) disease.
  • To elucidate the developmental patterns of MAC disease as visualized on CT scans.
  • To correlate CT findings with the sequential phases of MAC disease progression.

Main Methods:

  • Retrospective analysis of chest CT scans from 36 patients with MAC disease without predisposing conditions.

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  • Inclusion of 8 early-stage cases and 6 cases with long-term follow-up for developmental pattern assessment.
  • Detailed evaluation of CT findings including centrilobular abnormalities, airspace consolidation, and bronchiectasis.

    • Main Results:

    • Predominant CT features included centrilobular abnormalities, predominantly in the lower right upper lobe, middle lobe, and lingula.
    • Airspace consolidation and bronchiectasis were frequently observed in the middle lobe and lingula.
    • Developmental patterns showed initial centrilobular abnormalities progressing to fusion, consolidation, bronchial wall thickening, and subsequent bronchiectasis.

    Conclusions:

    • CT imaging reveals sequential phases in MAC disease development, starting with centrilobular abnormalities.
    • The identified CT features (centrilobular abnormalities, consolidation, bronchiectasis) are indicative of disease progression.
    • These findings aid in the non-invasive characterization and staging of MAC disease.