Systemic Sclerosis Associated Interstitial Lung Disease and Nintedanib: A Rare Disease and a Promising Drug.

Systemic sclerosis-associated interstitial lung disease (SSc-ILD) is a rare disease with a progressive nature, eventually leading to lung fibrosis. Nintedanib, a tyrosine kinase inhibitor, is a widely accepted drug for treating idiopathic pulmonary fibrosis (IPF), a disease that shares some similarities with SSc-ILD regarding pathological disease processes. In this review, we aim to discuss the pathogenesis of SSc-ILD and the overall role of nintedanib in the management of SSc-ILD. SSc-ILD involves multiple pathological mediators contributing to various pathways that ultimately cause lung fibrosis. The pathogenesis of SSc-ILD is a complex phenomenon and still needs further study. Nintedanib has demonstrated its efficacy in the treatment of SSc-ILD by reducing the progression of the pathological process. It has also proven its clinical significance in the management of SSc-ILD. However, the currently available literature does not have any evidence to compare the effectiveness of nintedanib with the already available treatment modalities such as cyclophosphamide (CYC), mycophenolate mofetil (MMF), and azathioprine (AZT). The current literature also lacks information about nintedanib's long-term consequences on patients with SSc-ILD. Therefore, to create better evidence-based treatment guidelines, we recommend that researchers conduct randomized clinical trials comparing nintedanib to MMF, CYC, AZT, etc., and continue surveillance to explore the long-term consequences of nintedanib.