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Fig. 11 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 11

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

Fig. 11

A 14-year-old male patient with history of rapid left-sided proptosis, swelling in the lateral aspect of the left orbit and dull aching left orbital pain. Initial orbital MRI with contrast was done. Axial T2-weighted image A shows hypointense infiltrative mass involving the left extraconal fat, the lateral bony wall, the left sphenoid bone and sinus, with left temporal epidural component. Axial FLAIR follow-up image B shows isointense signal with reduction in mass size and loss of its epidural component as compared to the initial MRI study. Coronal post-contrast T1-weighted image C shows an enhancing left lateral extraconal mass in the left orbit Follow-up coronal post- contrast T1-image D shows marked reduction in the mass size and enhancement. Evident diffusion restriction on DWI (b1000)/ADC (E, F). The ADC value of 1.12 × 10 −3mm2/s. Pathologically proved left orbital extraconal infiltrative lymphoma

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