Systemic sclerosis and interstitial lung disease: From pathogenesis, to screening, diagnosis, and classification

Interstitial lung disease (ILD) is a common and potentially devastating complication of systemic sclerosis (SSc), a chronic autoimmune disorder characterized by fibrosis and vascular abnormalities. The association between SSc and ILD underscores the intricate interplay between immune dysregulation, vasculopathy, and tissue fibrosis. This review provides a comprehensive overview of the immunological, clinical, and radiological features of ILD in the context of SSc. It highlights the diverse spectrum of ILD patterns observed in SSc patients, ranging from non-specific interstitial pneumonia to usual interstitial pneumonia. The intricate pathogenic mechanisms linking SSc and ILD involve aberrant immune responses, endothelial dysfunction, profibrotic cytokine signaling, and genetic factors. Immunological alterations, diagnostic challenges, and prognostic implications are discussed, underscoring the need for multidisciplinary management strategies. By elucidating the complex relationship between SSc and ILD, this review aims to contribute to a deeper understanding of the underlying mechanisms and facilitate the development of interdisciplinary interventions for improved patient outcomes.