<unk>  <unk>  is a rare form of pulmonary hypertension caused by progressive blockage of the small veins in the lungs. The blockage leads to high blood pressures in the arteries of the lungs, which, in turn, leads to heart failure. The<unk>  is progressive and fatal, with median survival of about 2 years from the time of diagnosis to death. The definitive therapy is lung transplantation.
Pulmonary venoocclusive disease
Pulmonary alveolar proteinosis
Chronic thromboembolic pulmonary hypertension
Pulmonary sequestration
Bronchiolitis obliterans
Idiopathic pulmonary haemosiderosis
Pulmonary hyalinizing granuloma
Acute eosinophilic pneumonia