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21 April 2016 : Case report  Spain

Bilateral Synchronous Ectopic Ethmoid Sinus Olfactory Neuroblastoma: A Case Report

Challenging differential diagnosis, Rare disease, Educational Purpose (only if useful for a systematic review or synthesis)

Elena Leon-SorianoABEF, Carolina AlfonsoABE, Laura YebenesB, Julio Garcia-PoloB, Luis LassalettaE, Javier GavilanE

DOI: 10.12659/AJCR.897623

Am J Case Rep 2016; 17:268-273

Abstract

BACKGROUND: Olfactory neuroblastoma (ONB), also known as esthesioneuroblastoma, is a rare malignant head and neck cancer thought to originate from the olfactory epithelium. It typically invades contiguous structures at presentation. We report a very rare case of multifocal and ectopic ONB.

CASE REPORT: A 41-year-old man presented with left nasal obstruction and occasional left epistaxis associated with headache. Endoscopic examination of the nasal cavities and computed tomography suggested bilateral polypoid masses. Histopathological diagnosis after endoscopic resection established bilateral olfactory neuroblastoma of the ethmoid sinuses. The patient received postoperative radiotherapy. He remains free of disease 4 years after treatment.

CONCLUSIONS: To the best of our knowledge this is the second documented case of multifocal ectopic olfactory neuroblastoma. Clinicians should consider ONB in the differential diagnosis of bilateral synchronous nasal and paranasal masses to avoid delayed diagnosis. Endoscopic resection of ONB could be an option in selected cases.

Keywords: Ethmoid Sinus - pathology, Esthesioneuroblastoma, Olfactory - pathology, Paranasal Sinus Neoplasms - pathology

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American Journal of Case Reports eISSN: 1941-5923
American Journal of Case Reports eISSN: 1941-5923