What does reticulation of the lungs mean?

Reticulation of the lungs refers to a pattern seen on imaging studies, particularly chest X-rays or CT scans, characterized by a network of thin, linear opacities within the lung tissue. This appearance often indicates the presence of interstitial lung disease or pulmonary fibrosis, where inflammation or scarring occurs in the lung interstitium. It can suggest various underlying conditions, including infections, autoimmune diseases, or exposure to environmental toxins. Further evaluation is typically needed to determine the specific cause and implications for lung function.