Board Review 1 – Case 14

Neuroradiology board review. This lecture is geared towards the ABR core exam for residents, but it would be useful for review for the ABR certifying exam or certificate of added qualification (CAQ) exam for neuroradiology.

More description and the answer (spoiler!) are seen below the video.

This case starts with a CT showing a mass in the right ethmoid air cells. There is dehiscence of the adjacent cribriform plate. MRI with contrast shows a mass predominantly in the ethmoid air cells, although there is intracranial extension with abnormal dural enhancement.

The diagnosis is: esthesioneuroblastoma

Esthesioneuroblastomas are neuroblastomas of the olfactory nerves. Their classic description is a mixed sinus and intracranial mass which sometimes has an intracranial cyst. The main differential diagnostic consideration is a squamous cell carcinoma of the sinuses.