Hepatopulmonary syndrome is a rare disorder that affects the lungs in individuals with liver disease. It is characterized by low levels of oxygen in the blood (hypoxemia) due to the presence of dilated blood vessels in the lungs. These blood vessels allow blood to bypass the normal exchange of gases in the lungs, leading to a decrease in oxygen levels. Symptoms of hepatopulmonary syndrome may include shortness of breath, difficulty breathing, and a bluish tint to the skin. Research in this area focuses on understanding the mechanisms underlying the development of the syndrome, improving diagnostic techniques, and developing effective treatments to improve outcomes for affected individuals.