PET/CT Features of Granulomatosis With Polyangiitis Mimicking Left Lung and Tracheal Malignancy.

Granulomatosis with polyangiitis is a systemic disorder that can affect nearly any organ system, with frequent involvement of the kidneys, lungs, skin, and eyes. Although some patients relapse months to years after treatment, relapsing more than a decade later, particularly with tracheal involvement, is rare. We report a case of granulomatosis with polyangiitis with PET/CT findings mimicking malignancy in the left lung and trachea.