Wegener's granulomatosis (VEG-eh-nerz gran-u-loe-muh-TOE-sis) is an uncommon disorder that causes inflammation of your blood vessels. This inflammation restricts blood flow to various organs.
Wegener's granulomatosis, which is also called granulomatosis with polyangiitis (GPA), often affects your kidneys, lungs and upper respiratory tract. The restricted blood flow to these organs can damage them. Wegener's can affect other organs, but this isn't as common, and generally isn't as serious.
Wegener's granulomatosis also produces a type of inflammatory tissue known as a granuloma that's found around the blood vessels. Granulomas can destroy normal tissue. There is no known cause for Wegener's granulomatosis.
Early diagnosis and treatment of Wegener's granulomatosis may lead to a full recovery. Without treatment, Wegener's granulomatosis can be fatal, most commonly from kidney failure.