PMC7772210_01
(A,B) The tumor presented isosignals on T1WI and T2WI. (C,E) The mass showed uniform enhancement after contrast agent injection. (D,F) Post-operative review by thoracic MRI showed that all tumors had been removed.
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F1
T1WI and T2WI presented isosignals (Figures 1A,B) and were uniformly enhanced after gadolinium-diethylenetriaminepentaacetic acid (GD-DTPA) injection (Figures 1C,E). The tumor was removed by T4-5 laminectomy under neurophysiological examination. The interface of the tumor tissue where it infiltrates the spinal cord was carefully separated under a microscope, and the whole tumor was removed (Figures 1D,F) with minimal bleeding.
(A) At low magnification, the tumor tissue is rich in cells showing a rounded oval to spindle-like shape, and the intercellular stroma is rich in "antler-like" parenchyma branching vessels (HE x 100). (B) Mitotic image is not easy to be seen in high magnification (HE x 400 mm).
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F2
Under light microscopy, the tumor tissue was rich in cells showing a rounded oval to spindle-like shape, and the intercellular stroma was rich in "staghorn" thin-walled branching vessels (Figure 2A). Mitotic figures were not easy to see (Figure 2B).
Both CD34 (A) and Vimentin (B) were positive by immunohistochemical staining. The Ki-67 index was ~20% (C).
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F3
Immunohistochemical staining was Ki-67(+20%), CD34(+), Vimentin(+), SSTR2(-), EMA(-), STAT6(-), D2-40(-), and GFAP(-) (Figure 3).