Granulocytic sarcoma of the nasal cavity is exceedingly rare. We describe the case of a 55-year-old man who presented with an intranasal mass that was later diagnosed as a granulocytic sarcoma. The mass was treated with rapid initiation of chemotherapy, which produced a substantial decrease in tumor bulk. Granulocytic sarcoma is often mistaken for lymphoma or other poorly differentiated malignancies, and the correct diagnosis requires a high index of clinical suspicion.
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