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Interstitial lung disease in systemic sclerosis.

G C Ooi1, M Y Mok, K W T Tsang

  • 1Department of Diagnostic Radiology, The University of Hong Kong, Queen Mary Hospital, SAR China. cgcooi@hkucc.hku.hk

Acta Radiologica (Stockholm, Sweden : 1987)
|May 20, 2003
PubMed
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High-resolution CT (HRCT) effectively assesses lung inflammation and fibrosis in systemic sclerosis (SSc). These HRCT findings correlate with reduced lung function, including diffusion capacity and lung volumes.

Area of Science:

  • Radiology
  • Pulmonology
  • Rheumatology

Background:

  • Systemic sclerosis (SSc) frequently involves the lungs, leading to significant morbidity and mortality.
  • Interstitial lung disease (ILD) is a common complication of SSc, impacting lung function and exercise tolerance.

Purpose of the Study:

  • To evaluate high-resolution CT (HRCT) parameters for inflammation and fibrosis in SSc patients.
  • To correlate HRCT findings with lung function, skin scores, and exercise tolerance.

Main Methods:

  • 45 SSc patients underwent thoracic HRCT, lung function tests, and modified Rodnan skin scoring.
  • HRCT scans were analyzed for four patterns of ILD: ground glass opacification (GGO), reticular, mixed, and honeycomb.
  • Inflammation and fibrosis indices were calculated from HRCT patterns and correlated with clinical and functional parameters.

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Main Results:

  • ILD was detected in 86.7% of SSc patients.
  • Abnormal lung function (FVC, TLC, DLco) was observed in a significant proportion of patients.
  • Total HRCT score, inflammation index, and fibrosis index showed significant correlations with lung function parameters (FVC, FEV1, TLC, DLco) and exercise tolerance.

Conclusions:

  • Qualitative HRCT is a valuable tool for assessing lung inflammation and fibrosis in SSc.
  • HRCT parameters demonstrate significant relationships with pulmonary diffusion capacity and lung volumes.
  • HRCT findings correlate with the extent of lung involvement and functional impairment in SSc.