case_images: PMC5299147_01
case_images: (a, b) Preoperative T1 magnetic resonance (MR) images demonstrates expansive changed and elongated right optic nerve. (c) Preoperative coronal plane T1 gadolinium-enhanced MR image. (d) Preoperative sagittal plane T2 MR image
case_images: SNI-7-1158-g001.jpg
case_images: PMC5299147_01_SNI-7-1158-g001.jpg
case_images: F1
case_images: MRI of the brain and orbits showed expansive changed and elongated right optic nerve with contrast enhancement; furthermore, a smaller lesion in the right temporal operculum region was visible in T2 and fluid-attenuated inversion recovery sequence, as well as a small oval lesion in the left cerebellar lobe [Figures 1 and 2].
case_images: (a, b) Preoperative magnetic resonance imaging showing left cerebellar and right temporal intracranial lesions
case_images: SNI-7-1158-g002.jpg
case_images: PMC5299147_01_SNI-7-1158-g002.jpg
case_images: F2
case_images: MRI of the brain and orbits showed expansive changed and elongated right optic nerve with contrast enhancement; furthermore, a smaller lesion in the right temporal operculum region was visible in T2 and fluid-attenuated inversion recovery sequence, as well as a small oval lesion in the left cerebellar lobe [Figures 1 and 2].
case_images: (a, b) Postoperative T2 images, axial and coronal plane. (c) Postoperative T1 axial plane image
case_images: SNI-7-1158-g003.jpg
case_images: PMC5299147_01_SNI-7-1158-g003.jpg
case_images: F3
case_images: After 3 years of follow-up, MRI showed complete tumor removal without any sign of recurrence [Figure 3].
case_images: (a) Microscopic features; mainly histiocytes and a few chronic inflammatory cells in fibrous background (hematoxylin and eosin x100). (b) Emperipolesis; an additional common histopathologic finding in Rosai-Dorfmann disease (hematoxylin and eosin x400)
case_images: SNI-7-1158-g004.jpg
case_images: PMC5299147_01_SNI-7-1158-g004.jpg
case_images: F4
case_images: The phenotype was consistent with RDD [Figures 4 and 5].
case_images: Immunohistochemistry: (a) Glial fibrillary acidic protein small fragments of brain tissue were positive whereas tumour was negative (x100). (b) CD68 positive histiocytic tumor cells (x400); (c) negative staining for CD1a (x100)
case_images: SNI-7-1158-g005.jpg
case_images: PMC5299147_01_SNI-7-1158-g005.jpg
case_images: F5
case_images: The phenotype was consistent with RDD [Figures 4 and 5].