Are the pipe lung hollow bags or spongy?

Pipe lung, or "pipe smoker's lung," refers to the respiratory issues that can arise from smoking tobacco pipes. The term does not specifically describe the physical characteristics of the lungs; rather, it indicates a condition where lung tissue may become damaged and inflamed. In this context, the lungs can develop areas of fibrosis, leading to a spongy texture due to scarring, rather than being hollow. Overall, the affected lungs may not function properly, impacting breathing and overall health.