In order to make a diagnosis of<unk>  a biopsy of the lung must be obtained, processed, and examined microscopically. As described above, the hallmark of diagnosing<unk>  is the presence of hyaline membranes. Most frequently<unk>  is associated with ARDS, but since there are clinical criteria (see Berlin criteria above) upon which we can diagnose ARDS, it is often unnecessary in all cases to obtain invasive biopsies of the lung. Additionally, there are limitations of the biopsy test since it is possible to sample a potentially normal area of lung even though there is<unk>  in the rest of the lung, resulting in a false negative.
Diffuse alveolar damage
Desquamative interstitial pneumonia
Lymphocytic interstitial pneumonia
Usual interstitial pneumonia
Pulmonary alveolar proteinosis
Pulmonary interstitial emphysema
Hepatization of lungs
Air trapping