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Egyptian Journal of Radiology and Nuclear Medicine
Fig. 6 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 6

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

Fig. 6

A 34-year-old male patient with acute onset of right-sided dull aching orbital pain and limited orbital movement Coronal T2WI and T1WI images A, B show enlarged right inferior and lateral recti muscles displaying T1 and T2 isointense signal with minor similar changes involving the left inferior rectus muscle. Complementary non-enhanced CT coronal image C shows bulky right inferior muscle and to lesser extent right lateral rectus muscle. Contrast-enhanced sagittal T1 fat-saturated image D shows marked contrast enhancement of inferior rectus muscle bulk. No diffusion-weighted restriction seen on DWI (b500) (E) and ADC (F). The ADC value is 1.1 × 10−3 mm2/sec. Right-sided orbital inflammatory pseudotumor, Myositic type; responded well 2 weeks after therapeutic trial with corticosteroids

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