PMC4960921_01
T1 Sagittal magnetic resonance imaging (MRI) with contrast (a) and T1 axial MRI (b) without demonstrating intradural extramedullary compressive lesion in D12-L1
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F1
A dorsolumbar magnetic resonance imaging (MRI) was performed, revealing a D12-L1 intramedullary mass, with necrosis and irregular contrast enhancement [Figure 1].
Dense cell proliferation is observed, with areas of spindle cell pattern (a: H&E), with some areas of pleomorphism, lots of mitosis, some of them atypical, and karyomegaly and nuclear irregularity (b: H&E). This neoplastic lesion was negative for cytokeratin (c: CkAE1/AE3) and intense and diffuse positivity form vimentin (d). Cell proliferation rate was high, about 30% (e: Ki67), showing glial fibrillary acid protein positive (f)
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F2
Histopathological examination confirmed that the lesion was a GBS [Figure 2].
(a) T1 axial magnetic resonance imaging (MRI) with contrast revealing an enhancing mass in the left atrium. (b) T1 sagittal MRI with contrast showing an enhancing mass in fourth ventricle
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F3
A third enhancing mass was diagnosed in fourth ventricle [Figure 3].