case_images: PMC8532567_01
case_images: Spinal MRI examination revealed a circular mass in the spinal canal of T12-L2 with unclear boundaries. (a and b) Signaling within the tumor was not uniform, with hypointensity on T1-weighted images (T1WI) and (c-e) speckled hyperintensity on T2-weighted images (T2WI).
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case_images: Signaling within the tumor was not uniform, with hypointensity on T1-weighted imaging (T1WI) (Figure 1a and b) and speckled hyperintensity on T2-weighted imaging (T2WI) (Figure 1c-e).
case_images: (a) The nerve roots were carefully separated from the tumor under a microscope and the tumor was completely excised. (b) There was no residual tumor in the spinal canal. (c) The fish-shaped round mass obtained by gross total resection. (d) Pedicle screws and connecting rods were used to reconstruct the area.
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case_images: The tumor's capsule was incomplete, its boundary was unclear, and it was adherent to the peripheral nerve roots. The nerve roots were carefully separated from the tumor under a microscope, and the tumor was completely excised (Figure 2a). We confirmed that there was no residual tumor in the spinal canal (Figure 2b and c). Four pedicle screws were placed on the T12 and L1 pedicles, and two connecting rods were used to reconstruct the vertebral body (Figure 2d).
case_images: Postoperative pathology of the tumor tissue revealed undifferentiated small round blue cells with hematoxylin and eosin staining: x40 (a) and x100 (b).
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case_images: PCK (-), TdT (-), LCA (-), EMA (-), CgA (-), CD34 (-), MyoD1 (-), desmin (-), and HMB45 (-). Postoperative pathology of the tumor tissue revealed undifferentiated small round blue cells, and the pathological diagnosis was PIEES/PNET (Figure 3a and b).