PMC5283168_01
Preoperative MRI, T1 with contrast, showing an ethmoid mass extending through the cribriform intracranially. Dimensions 3.9 x 1.9 x 2.4 cm.
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A subsequent magnetic resonance imaging (MRI) showed an ethmoid mass extending through the cribriform intracranially, measuring 3.9 x 1.9 x 2.4 cm at its largest dimensions (Fig. 1).
Uniform clusters of ovoid cells arranged around vessels with moderate nuclear enlargement. H&E, 200x.
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Pathology revealed a vascular neoplasm with a uniform cluster of ovoid cells arranged around the vessels and moderate focal nuclear enlargement (Fig. 2).
Tumor cells stained positive for CD31. 200x.
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Tumor cells stained positive for CD31 and smooth muscle actin (SMA) but negative for CD34, S100, and pan-cytokeratin on immunohistochemistry (Fig. 3).
Postoperative MRI, T1 with contrast, showing gross total resection of the mass with nasoseptal flap reconstruction of the skull base.
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Repeat MRI showed gross total resection of the mass and no detectable recurrence (Fig. 4).