Vascular disorders of the lungs. These can result in granulomatosis with polyangiitis. This can be an unusual disease where the blood vessels are inflamed. Problems in this vast network of blood and lymph vessels can result in An array of health issues that may sometimes grow to be extreme, and lethal.[3] https://www.sgvascularctr.com/a-comprehensive-guide-to-aortic-aneurysm-in-singapore/