Olfaction Disorders

**Definition:** Impaired ability to smell. This may be caused by OLFACTORY NERVE DISEASES; PARANASAL SINUS DISEASES; viral RESPIRATORY TRACT INFECTIONS; CRANIOCEREBRAL TRAUMA; SMOKING; and other conditions.

**Tree numbers:** - C10.597.751.600 - C23.888.592.763.550

**Synonyms:** - Smell Disorders