Sarcoidosis is a multisystem, granulomatous disorder of uncertain etiology. Sarcoid has a predilection for the lungs (e.g., hilar adenopathy) and may produce anterior or posterior uveitis (e.g., choroiditis, retinal vascular disease, optic neuritis, optic nerve granuloma). Although lacrimal gland and extraocular muscle involvement may occur in sarcoid, orbital involvement

FIGURE 7.5. Axial CT scan with bone windows shows right sinus lesion with orbital extension due to renal cell carcinoma metastasis.

is uncommon.14,15 Neurologic manifestations include optic neuropathy, papilledema, intracranial granuloma, vasculitis, and meningitis.16-18

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