case_images: PMC7734128_01
case_images: MRI characteristics of Rosai-Dorfman disease involving sellar region. (A) Coronal and (B) sagittal T1-weighted magnetic resonance images. (C) coronal and (D) sagittal contrast-enhanced magnetic resonance images reveal thickened pituitary stalk with obvious homogenous enhancement (red arrow).
case_images: fmed-07-613756-g0001.jpg
case_images: PMC7734128_01_fmed-07-613756-g0001.jpg
case_images: F1
case_images: Contrast-enhanced brain MRI showed that the pituitary stalk was thickened with obvious homogenous enhancement and the high signal of posterior pituitary was disappeared in T1-weighted images (Figure 1).
case_images: Histological features of Rosai-Dorfman disease involving sellar region. (A) H-E staining of specimen reveals the large-size histiocyte with the typically foamy eosinophilic cytoplasm, original magnification x40 (black arrow). (B) Positive immunohistochemical staining for S-100, original magnification x100.
case_images: fmed-07-613756-g0002.jpg
case_images: PMC7734128_01_fmed-07-613756-g0002.jpg
case_images: F2
case_images: The diagnosis of Rosai-Dorfman disease was therefore yielded (Figure 2).
case_images: Timeline of the case presentation.
case_images: fmed-07-613756-g0003.jpg
case_images: PMC7734128_01_fmed-07-613756-g0003.jpg
case_images: F3
case_images: No abnormal lesions were found in head, neck, thorax, abdomen, and pelvis (Figure 3).