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Sections from the mass showed a highly cellular neoplasm comprising predominantly epithelioid cells with focal spindle cell morphology and scattered, large, thick-walled blood vessels.
Among the nonmesenchymal spindle cell tumors of the sinonasal tract, spindle cell carcinomas and melanomas are 2 essential entities to be differentiated.
One patient who had undergone a nondiagnostic CT fluoroscopy-guided TBNA proved to have a metastatic spindle cell sarcoma at surgery.
The aspiration material showed an atypical spindle cell and pleomorphic cell population.
A distinct feature found within the spindle cell areas is the presence of epithelioid neoplastic cells with vacuolization.