PMC4078421_01
25-year-old woman with a long history of progressive bilateral protrusion of eyes, periorbital swelling without vision changes presented with intermittent attacks of retrobulbar pain and headache later diagnosed with idiopathic orbital pseudotumor. (a) Axial T2, (b) axial fat-saturated T1, (c) axial post-contrast fat-saturated T1, (d) coronal fat-saturated T2, and (e) coronal fat-saturated T1-weighted images with (f and g) diffusion-weighted images with corresponding (h and i) apparent diffusion coefficient (ADC) maps demonstrate multispatial massive infiltrative changes including pre-septal (long thick arrows) and post-septal orbital structures (thin arrows) and soft tissue of buccal (asterisks on d and e) and zygomatic regions (arrowheads on c-e). Infiltrated areas are enhancing, T2 hypointense in appearance with restricted diffusion (arrows on f and i), suggestive of either lymphoproliferative diseases or sarcoidosis.
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F1
A vascular malformation was suspected and patient underwent routine and contrast-enhanced orbital MRI [Figure 1].