FIG 1. Case 1, extranodal orbital involvement in Rosai-Dorfman disease. Axial (A) image from contrast-enhanced CT scan demonstrates abnormal, heterogeneously enhancing orbital soft tissue, producing marked bilateral exophthalmos and bowing of the right optic nerve (arrows). Coronal (B) image from the same examination reveals involvement of the ethmoid and maxillary sinuses, and the nasal cavity, with prominent orbital floor hyperostosis, and demineralization of the turbinates