Interstitial markings in the lungs are marks that depict injury or disease in the lungs due to abnormal healing. These can be a sign of anything from Interstitial lung disease to COPD and a few other conditions.

The term "interstitial" refers to the space between tissues or cells in the body. In medicine, interstitial can describe conditions or diseases that affect or occur in these spaces, such as interstitial lung disease or interstitial cystitis.

The Interstitial Lung Disease which is also known as the Diffuse Parenchymal Lung Disease mainly refers to a group of lung diseases affecting the interstitium or more commonly the tissue and space around the air sac of the lungs.

There are many signs and symptoms of Interstitial Lung Disease. The common ones are :

External Breathlessnes

Cough

Production of Sputum

Wheezing

Hemoptysis

Nonrespiratory Symptoms such as myalgia, arthralgia, sclerodactyly.

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Not for mild interstitial lung disease. However, if it becomes severe, limiting the ability of the lung to do any useful work of breathing (oxygen in and CO2 out), then a lung transplant may be the only thing that will help.

I have found a picture of an X ray of a person with pathologically proven respiratory bronchiolitis associated interstitial lung disease. Follow the related links below

(Rheumatoid Lung Disease)