Ectopic Primary Olfactory Neuroblastoma of the Maxillary Sinus

We report a case of ONB in the maxillary sinus. A 63-year-old female presented with left sided nasal obstruction and epistaxis. MRI showed a nonenhancing left maxillary sinus tumor. Histologic sections showed ONB, Hyams grade IV, invading bone, skeletal muscle and adjacent fibroadipose tissue. It is essential to be accurate when diagnosing sinonasal tumors since the differential diagnosis is broad and one must consider the possibility of ectopic ONB, although it is rare.
Source: Annals of Diagnostic Pathology - Category: Pathology Authors: Source Type: research