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. Author manuscript; available in PMC: 2015 Dec 15.
Published in final edited form as: AJR Am J Roentgenol. 2015 Nov;205(5):1075–1085. doi: 10.2214/AJR.14.13970

Fig. 1.

Fig. 1

MRI of 36-year-old man with tumefactive demyelinating lesion (TDL). A–E, Axial DW image (A), axial T2-weighted FLAIR image (B), axial gadolinium-enhanced T1-weighted image (C), axial apparent diffusion coefficient (ADC) map (D), and axial ADC map (E) with ROI (outline, E) drawn on it after review of all images. ROI was drawn to include whole lesion and includes rim of reduced diffusion seen on DW image (A) and ADC maps (D and E) and corresponding to incomplete rim of contrast enhancement seen on gadolinium enhanced T1-weighted image (C). Minimum ADC (ADCmin) measured 0.764, and average ADC (ADCavg) measured 1.620. Relatively younger age of patient and high ADCmin, high ADCavg, and incomplete rim of contrast enhancement all suggest TDL. Diagnosis of TDL was proven at biopsy.