A 57‐year‐old Female With a Benign Tumor in the Ethmoid Sinus

A 32-year-old man was found to have a nasal mass on DOTATATE positron emission tomography (PET) scan to investigate the cause of his syndrome of inappropriate antidiuretic hormone secretion (SIADH). The patient presented 6 years earlier with malignant hypertension followed by a second emergency admission for hyponatraemia. Multiple scans and blood tests over 6 years yielded no cause for his SIADH. Nasendoscopy was unremarkable. A PET scan prompted endoscopic sinus surgery which resulted in the resection of a mass in the anterior hiatus semilunaris. The histological findings were fitting with a diagnosis of a neurocytic-type tumour favouring an olfactory neurocytoma. Following resection, the patient remains well and is cured of his SIADH. An olfactory neurocytoma although rare should be considered as a benign differential for a mass in the nasal space. This case demonstrates how an olfactory neurocytoma can present as a cause of SIADH.

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Olfactory neurocytoma as a unique cause of chronic SIADH

Farwana

Tornari

Sandison

et al. 2021

BMJ Case Rep

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A 57‐year‐old Female With a Benign Tumor in the Ethmoid Sinus

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Olfactory neurocytoma as a unique cause of chronic SIADH

Olfactory neurocytoma as a unique cause of chronic SIADH

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