PMC5379813_01
CT scan Brain plain study axial section normal window (a) and bone window (b) showing isodense lesion in clivus with expansion of bone and peripheral egg shell calcification and extension to sphenoid and nasopharynx, coronal section (c) showing extension of lesion to bilateral cavernous sinuses, axial section contrast study (d) showing uniform well enhancement of lesion. MRI Brain plain T2WI axial section (e) and T1 WI sagittal section (f) showing well defined isointense clival lesion on T1 and T2 WI
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F1
The MRI brain plain study demonstrated the lesion in the clivus and sphenoid sinus, sella which was isointense on the T1 and T2 weighted images [Figure 1].
Histopathological examination with different magnification x100 and x400 showing mononuclear cells and osteoclast like giant cells with similar nucleoli. EMA stain was negative
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F2
These histopathological features are consistent with a benign GCT [Figure 2].