PMC9479521_01
(a-d) Preoperative MRI aspect of the lesion, showing isointensity in T1 (a), hypointensity in T2 (b) and a homogeneous contrast enhancement lesion (c and d).
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F1
The lesion appeared isointense on T1-weighted sequences and hypointense on T2-weighted images and was homogeneously contrasted by gadolinium [Figures 1a-d].
Intraoperative microscopical view after the opening of dura mater and hemostasis, showing the gray-whitish intramedullar lesion that includes radicles.
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F2
Intraoperatively, the lesion appeared gray-whitish and was present within the intramedullary space without a clear cleavage plane with the spinal cord [Figure 2].
(a and b) SFT composed of spindled monomorphic cells admixed with collagenous stroma and capillaries (HematoxilinEosin, x2.5) (a), STAT6 immunoistochemistry: nuclear expression in neoplastic cells; endotelial cell are negative (STAT6, x30) (b).
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F3
Histological analysis revealed the main diagnostic characteristics of SFT: presence of cells organized into fascicles and hypocellular areas with fibrous stroma, immunoreactivity for CD34 and bcl-2, evidence of nuclear expression of STAT6, and the absence of mitosis or necrosis [Figures 3a, b].