The utility of orbital imaging in the evaluation of orbital disease
Fig 5
Granulomatosis with polyangiitis (GPA).
Coronal bone (A) and soft tissue (B) window non-contrast CT of the sinuses in a 22 year-old male shows typical pan-sinus soft tissue opacification and nasal strands (thick arrow, A), foci of osseous erosion (thin arrows, A) and soft tissue extension into the adjacent orbits (white dashed arrows, B). Axial bone window (c) shows sclerosis of sinus walls (arrow) typical of chronic inflammatory disease and particularly GPA. Both radiologists agreed on the diagnosis of inflammation and GPA, consistent with the clinical diagnosis.