Pulmonary involvement in progressive systemic sclerosis: sequential evaluation with CT, pulmonary function tests, and...

Area of Science:

• Pulmonary Medicine
• Radiology
• Rheumatology

Background:

• Progressive systemic sclerosis (PSS) frequently involves the lungs, leading to significant morbidity and mortality.
• Early detection and accurate assessment of lung involvement are crucial for managing PSS patients.
• Computed tomography (CT) is a key imaging modality for evaluating pulmonary changes.

Purpose of the Study:

• To correlate computed tomographic (CT) findings with functional lung parameters and bronchoalveolar lavage (BAL) results in patients with PSS.
• To assess the progression of lung changes over time using CT.
• To determine the utility of CT in predicting the severity of lung damage in PSS.

Main Methods:

• Retrospective analysis of CT scans from 53 patients with PSS.
• Correlation of CT findings with pulmonary function tests and BAL results.
• Longitudinal assessment of lung changes in a subset of 17 patients.

Main Results:

• CT scans were normal in 21 patients with normal lung function.
• Pleural and parenchymal abnormalities were identified in 32 patients.
• Patients with honeycombing showed reduced diffusing capacity, particularly those with moderate ground-glass opacities.
• BAL revealed increased neutrophils in patients with abnormalities compared to those without.

Conclusions:

• CT is the preferred method for assessing parenchymal destruction in PSS.
• Ground-glass opacities on CT can predict the severity of lung damage.
• CT findings, combined with BAL and functional parameters, aid in comprehensive lung evaluation in PSS.