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Figure 11: 45-year-old man presented with history of painless cervical lymphadenopathy, weakness of both the lower limbs and bladder disturbances since 3 months. Contrast enhanced CT (a) in venous phase showed enlarged left axillary lymph nodes (blue arrow). MRI sagittal T1, T2 (b and c) showed a isointense epidural lesion (large arrow) causing compression, anterior displacement with hyperintense signal in the cord (small arrow in c). There was focal altered marrow signal in the posterior aspect of the adjacent vertebral body (arrow in b). Intense homogenous enhancement of the lesion (large arrow) and adjacent marrow (small arrow) of posterior vertebral body was noted on post contrast study (d and e). Histopathological image (f) showed prominent emperopolesis (arrow) and S100 positive histiocytes (curved arrow) consistent with Rosai–Dorfman disease

Figure 11: 45-year-old man presented with history of painless cervical lymphadenopathy, weakness of both the lower limbs and bladder disturbances since 3 months. Contrast enhanced CT (a) in venous phase showed enlarged left axillary lymph nodes (blue arrow). MRI sagittal T1, T2 (b and c) showed a isointense epidural lesion (large arrow) causing compression, anterior displacement with hyperintense signal in the cord (small arrow in c). There was focal altered marrow signal in the posterior aspect of the adjacent vertebral body (arrow in b). Intense homogenous enhancement of the lesion (large arrow) and adjacent marrow (small arrow) of posterior vertebral body was noted on post contrast study (d and e). Histopathological image (f) showed prominent emperopolesis (arrow) and S100 positive histiocytes (curved arrow) consistent with Rosai–Dorfman disease