A Comprehensive Review of Interstitial Lung Abnormalities

Area of Science:

• Pulmonology
• Radiology
• Genetics

Background:

• Interstitial lung abnormalities (ILAs) are radiological findings in individuals without suspected interstitial lung disease (ILD).
• Prevalence varies from 2.5% to 16.7% in screening and population cohorts.
• ILAs are associated with increased mortality and risk factors like age, smoking, and MUC5B gene polymorphisms.

Purpose of the Study:

• To review the current understanding of ILAs.
• To summarize prevalence, risk factors, progression, biomarkers, and clinical management.
• To highlight the challenge in differentiating ILAs from early ILD.

Main Methods:

• Literature review of studies on ILAs.
• Analysis of prevalence data from lung cancer screening and population cohorts.
• Synthesis of information on risk factors, progression rates, and clinical management strategies.

Main Results:

• ILAs are prevalent and associated with mortality.
• Older age, smoking, and MUC5B polymorphisms are key risk factors.
• Progression occurs in 20%-76% of cases over 2-6 years, necessitating risk stratification.

Conclusions:

• ILAs are significant radiological findings requiring careful clinical evaluation.
• Distinguishing ILAs from early ILD is crucial for appropriate patient management.
• Further research into biomarkers and standardized management strategies is warranted.