case_images: PMC10316132_01
case_images: Magnetic resonance imaging T2-weighted image showing well-defined rounded lesion in the pituitary fossa.
case_images: SNI-14-220-g001.jpg
case_images: PMC10316132_01_SNI-14-220-g001.jpg
case_images: F1
case_images: Her magnetic resonance imaging (MRI) was showed well defined rounded lesion in the pituitary fossa which was isointense on T1-weighted image and hyperintense on T2-weighted images [Figure 1].
case_images: Magnetic resonance imaging T1 post contrast sagittal view showing thick peripheral enhancement.
case_images: SNI-14-220-g002.jpg
case_images: PMC10316132_01_SNI-14-220-g002.jpg
case_images: F2
case_images: In postcontrast sagittal image, it showed thick peripheral enhancement [Figure 2].
case_images: Tumor cells negative for S100 (a), show nuclear expression of thyroid transcription factor 1 (b), and lack glial fibrillary acidic protein staining (c).
case_images: SNI-14-220-g003.jpg
case_images: PMC10316132_01_SNI-14-220-g003.jpg
case_images: F3
case_images: It was glial fibrillary acidic protein (GFAP) negative and thyroid transcription factor 1 (TTF1) positive [Figure 3].
case_images: (a) x10: Hypocellular lesion composed of bundles and aggregates of spindle to epitheloid cells, set in eosinophilic background. (b) x20: High magnification showing cells with bland nuclei and eosinophilic cytoplasm. There is no significant cytological atypia or mitosis.
case_images: SNI-14-220-g004.jpg
case_images: PMC10316132_01_SNI-14-220-g004.jpg
case_images: F4
case_images: On pathological examination, the sample showed a hypocellular lesion, composed of ovoid to spindle cells, arranged in short bundles and sheets [Figure 4].