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British Journal of Radiology (2004) 77, 1016-1021
© 2004 British Institute of Radiology
doi: 10.1259/bjr/79074348
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Neuroradiological findings of intracranial schwannomas not arising from the stems of cranial nerves

Boning Luo, MD, PhD1, Gengxi Sun, MD1, Bo Zhang, MD1, Kangfu Liang, MD1, Jianming Wen, MD2 and Kunhao Fang, MD, PhD1

1 Department of Radiology, The First Affiliated Hospital of Sun Yat-sen University and 2 Department of Pathology, Medical College of Sun Yat-sen University, Guangzhou 510080, PR China



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  		Figure 1. Coronal fluid attenuated inversion recovery (FLAIR) image: the tumour was located left subfrontally and the cystic area demonstrated hyperintense signal.

 


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  		Figure 2. Contrast enhanced coronal image: tumour had extended into the ethmoidal sinus, and the intracerebral portion contained large areas of cystic degeneration.

 


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  		Figure 3. Transverse T2 weighted image: the tumour in the right inferior temporal lobe was seen as mixed signal.

 


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  		Figure 4. Contrast enhanced transverse CT: the mass depicted nodular enhancement. The posterosuperior portion contained areas of cystic degeneration.

 


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  		Figure 5. Non-contrast transverse CT: the mass in the right subfrontal lobe showed a hypodense to isodense mass with a distinct border.

 


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  		Figure 6. Contrast enhanced transverse CT: the mass was inhomogeneously enhanced after contrast medium.

 


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  		Figure 7. Transverse T1 weighted image: the inhomogeneous mass in the septum pellucidum was hypointense to isointense.

 


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  		Figure 8. Contrast enhanced coronal T1 weighted image: the tumour was significantly enhanced after contrast medium.

 


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  		Figure 9. Photomicrograph showing the type A pattern of a schwannoma, composed of compact spindle cells focally arranged in bundles (top) and the type B pattern area (bottom). Note the tumour cells arranged loosely on a dense fibrocollagenous focally hyalinized stroma (haematoxylin and eosin stain; original magnification x 100).

 


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  		Figure 10. Photomicrograph showing positive immunohistochemical staining for S-100 protein (original magnification x 400).

 




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