We hypothesize that hypoxia-induced pulmonary vascular remodeling is mediated by macrophage migration inhibitory factor (MIF), that remodeling is in fact the reflection of a chronic inflammatory process, and that MIF may be a useful biomarker of the severity and progression of both ILD and PH.

We hypothesize that hypoxia-induced pulmonary vascular remodeling is mediated by macrophage migration inhibitory factor (MIF), that remodeling is in fact the reflection of a chronic inflammatory process, and that MIF may be a useful biomarker of the severity and progression of both ILD and PH.

To study this hypothesis, we have two specific aims:

1. To evaluate plasma MIF concentration as a marker of severity in ILD and PH and
2. To determine the utility of breathe condensate analysis in the evaluation of ILD and PH. If we are successful in identifying MIF as a biomarker, it may identify MIF as a useful therapeutic target, as we have shown in other inflammatory disorders.

Inclusion Criteria:

• Subject are at least 18 years of age
• Subject has confirmed Pulmonary Hypertension and Interstitial Lung Disease
• Subject are able to complete study procedures, such as spirometry, and Pulmonary Exercise test.

Exclusion Criteria:

• Subject are pregnant
• Subject is unable to perform tasks associated with study

Subjects are either a healthy volunteer, or someone who has confirmed Pulmonary Hypertension and Interstitial Lung Disease