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Fig. 2 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 2

From: Value of diffusion-weighted magnetic resonance imaging (DWI) in differentiating orbital lymphoma from idiopathic orbital inflammatory pseudotumor

Fig. 2

A 56-year-old male with acute sinusitis presented with left-sided orbital pain and blurring of vision. Axial T1-weighted image A shows hypointense signal involving the sclera of left eye, the related intra- and extraconal fat planes and the lateral rectus muscle. Coronal T2-weighted image B shows an extraconal mass involving the left lateral rectus muscle, the lacrimal gland with intraconal extension. Post-contrast T1 fat-saturated images C,D show homogeneous enhancement of the extraconal mass and its intraconal component. No diffusion-weighted restriction seen on DWI (b500) (E) and ADC (F). The ADC value for the lesion is 1.27 × 10 −3 mm2/ sec. FNAC of the mass proved to be left-sided orbital inflammatory pseudotumor

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