bilateral anosmia
Last reviewed 06/2023
Bilateral anosmia is more common than unilateral, and has more diverse causes - a variety of conditions can lead to complete loss of the sense of smell.
Possible causes of bilateral anosmia include:
- upper respiratory tract infection
- meningioma of the olfactory groove - a late manifestation
- ethmoid tumours
- head injury - including cribriform plate fracture
- meningitis
- hydrocephalus
- frontal lobe tumour
- Kallman's syndrome
- conductive problems - enlarged turbinates, nasal polyps