This patient went on to have a biopsy of the mass though the left nasal cavity. 

FINDINGS: Undifferentiated carcinoma.  The biopsy shows an undifferentiated carcinoma associated with an extensive plasmacytic infiltrate. The morphology of the tumor is consistent with the recurrence of nasopharyngeal carcinoma. Tumors with this morphology may also occur as a primary in the nasal cavity. Correlation with the clinical findings is recommended.