Figure 3. MRI of compressive optic neuropathy caused by dural lesions in sarcoidosis MRI of compressive optic neuropathy caused by dural lesions in sarcoidosis (A, B) Orbital apex mass with a progressive painful optic neuropathy and sarcoidosis of the lungs, mediastinum, and heart. (C, D) Two cases of progressive optic neuropathy with striking meningeal enhancement and swelling to form mass lesions. Despite intensive treatment with corticosteroids and immunosuppression, neither case showed a meaningful improvement in visual acuity. Desmond P. Kidd et al. Neurol Neuroimmunol Neuroinflamm 2016;3:e270 © 2016 American Academy of Neurology