Pulmonary veno-occlusive disease is an extremely rare disease that causes high blood pressure in the lung arteries (pulmonary hypertension).
Pulmonary vaso-occlusive disease
In most cases, the cause of pulmonary veno-occlusive disease is unknown. The high blood pressure occurs in the pulmonary arteries, which are the lung arteries directly connected to the right side of the heart.
The condition may be related to a viral infection. It may occur as a complication of certain diseases such as lupus, or as a complication of leukemia, lymphoma, chemotherapy, or bone marrow transplantation.
The disorder is most common among children and young adults. As the disease gets worse, it causes narrowed pulmonary veins, pulmonary artery hypertension, and congestion and swelling of the lungs.
Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital, Boston, MA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.