case_images: PMC11021090_01
case_images: (a and b) Computed tomography imaging. (a) A hyperdense lesion was observed in the sella turcica (9.5 mm in diameter). (b) Lateral ventricles were slightly enlarged. (c-f) Magnetic resonance imaging. (c) Fluid-attenuated inversion recovery image showed a hyperintensity lesion in the cerebral peduncle that implied a hematoma. (d) No cerebrovascular lesion was detected on magnetic resonance angiography. (e and f) The coronal images showed that the sellar snowman-like lesion was hypointense on T1-weighted imaging and hypointense with niveau on T2-weighted imaging.
case_images: SNI-15-100-g001.jpg
case_images: PMC11021090_01_SNI-15-100-g001.jpg
case_images: F1
case_images: Whole-body computed tomography (CT) did not detect any apparent abnormality, except for a slightly high-density 10-mm mass in the sella turcica and enlarged lateral ventricles (Evans index, 0.33; callosal angle, 61 ) [Figures 1a and b]. By contrast, magnetic resonance imaging (MRI) showed a fluid-attenuated inversion recovery-hyperintensity lesion in the peduncular cistern [Figure 1c], although no evidence of vascular lesions was detected on magnetic resonance angiography [Figure 1d]. However, pituitary MRI showed a dumbbell-like hypointense core with a hyperintense rim on T1-weighted imaging [Figure 1e] and a hypointense mass with niveau on T2-weighted imaging [Figure 1f]. Brain CT showed possible hydrocephalus (Evans index, 0.35; callosal angle, 50 ), which was similar to the initial CT [Figures 1a and 2].
case_images: Imaging at three months after symptom onset. (a) Computed tomography imaging shows the enlarged lateral ventricles, which were similar to the prior images taken at admission. His Evans index was 0.36, and the callosal angle was 54 . (b) Magnetic resonance images showed the resolution of the pituitary lesion on T2-weighted imaging.
case_images: SNI-15-100-g002.jpg
case_images: PMC11021090_01_SNI-15-100-g002.jpg
case_images: F2
case_images: Brain CT showed possible hydrocephalus (Evans index, 0.35; callosal angle, 50 ), which was similar to the initial CT [Figures 1a and 2].