PMC6893274_01
Follow-up CT with contrast medium one month after surgery for clear cell renal cell carcinoma showing a homogeneously enhanced mass without intralesional calcifications.
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Follow-up CT imaging with contrast medium one month after the surgery for the kidney cancer detected a homogenously enhanced mass without intralesional calcifications in the spinal canal at the level of T9 (Figure 1), although she had no symptoms related to the mass lesion.
MRI findings showing an intradural-extramedullary mass with isointensity on T1-weighted images (a) and hypointensity on T2-weighted images (b), enhanced heterogeneously with gadolinium (c).
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18F-FDG-PET/CT findings showing no accumulation in the intradural-extramedullary site at the level of T9.
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White-yellowish hard tumor was resected in a piecemeal fashion.
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First, we performed laminectomies of T8 and T9 and a biopsy of a white-yellowish hard tumor located in the intradural-extramedullary site for intraoperative pathological consultation (Figure 4), which showed no evidence of malignancy.
The tumor consisted of spindle cells with ovoid to spindle-shaped nuclei, arranged without a pattern with stromal hyalinized collagen (HE staining) (a, b). On immunohistochemical staining, CD34 (c), bcl-2 (d), and STAT6 (e) were positive, while S-100 protein (f) and EMA (g) were negative.
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On an immunohistochemical examination, CD34, bcl-2, and STAT6 were positive, while S-100 protein, neurofilament protein, and EMA were negative (Figure 5).
MRI of the thoracic spine showed no evidence of tumor recurrence three years after the surgery for intradural-extramedullary SFT/HPC.
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MRI of the thoracic spine showed no evidence of tumor recurrence (Figure 6), and enhanced whole-body CT also showed no evidence of metastasis or recurrence of SFT/HPC and other tumors.