Fig. 4From: Differentiating tracheobronchial involvement in granulomatosis with polyangiitis and relapsing polychondritis on chest CT: a cohort studyAtypical tracheal wall thickenings. A Unenhanced chest computed tomography (CT) shows tracheal wall thickening sparing the posterior membrane (arrow) in a patient with granulomatosis with polyangiitis. B Unenhanced chest CT showing circumferential tracheal wall thickening (arrow) in a patient with relapsing polychondritisBack to article page