This Intermediate Level course reviews nasal cytology, which is a very useful tool in diagnosing nasal allergic disorders. You'll read about the cytological aspects of nasal mucosa and microscopic techniques used for diagnosis and the most common cells seen in allergic and non-allergic rhinitis.

At the completion of this course the reader will be able to:

1. Recall the background of nasal cytology and explain what it can be used for diagnosing.
2. List the procedural steps for sample collection, staining, and reviewing a nasal smear.
3. Describe the nasal cytology seen in allergic and non‐allergic rhinitis.
4. Discuss the term "overlapped" rhinitis and possible treatment modalities.
5. In conclusion, discuss why it is desirable to perform nasal cytology in symptomatic children.