PMC9610279_01
Preoperative T2-weighted sagittal (a), sagittal gadolinium-enhanced T1-weighted (b) and T2-weighted axial (c) MRI showing a stretched and fusiform intradural extramedullary lesion at T5-T10 level about 13 cm long in craniocaudal direction. Postoperative T2-weighted sagittal (d), sagittal gadolinium-enhanced T1-weighted (e) and T2-weighted axial (f) MRI showing complete resection of the mass lesion.
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F1
Magnetic resonance imaging (MRI) revealed a stretched and fusiform intradural extramedullary lesion at T5-T10 level with uniform intensity in T2-weighted sagittal and axial images and strongly enhanced after gadolinium administration [Figure 1]. A postoperative MRI showed complete resection of the mass lesion [Figure 1].
It shows extramedullary tanycytic ependymoma removed in one piece.
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F2
After dural opening, a well-demarcated tumor mass at the T5-T10 spinal cord level, which was attached to the spinal cord just in 1 point (just 2 mm in length), was seen and removed in one piece [Figure 2].
Hematoxylin and eosin staining 200 x (a) and 400 x (b) showed spindled and bipolar cells with clear cytoplasm. Immunohistochemical analyses showed tumor cells diffusely positive for GFAP (c) and S100 protein (d) and dot-like Golgi staining with EMA (e).
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F3
Histopathological analysis showed brown-gray encapsulated lesion characterized by spindled and bipolar cells with clear cytoplasm and focal hemorrhagic areas [Figure 3]. Immunohistochemical analyses showed tumor cells diffusely positive for GFAP and S100 protein and focally positive for EMA with dot-like patterns consistent with ependymal differentiation [Figure 3].