Patterns of Lymphatic Drainage of the Paranasal Sinuses

Sinus	Lymphatic Drainage
Frontal	Submandibular (level IB)
Ethmoid	Submandibular (level IB)
Maxillary: Main	Lateral retropharyngeal and internal jugular (levels II, III, and IV)
Maxillary: Lateral antrum	Submandibular (level IB)
Sphenoid	Lateral retropharyngeal

References

• Som PM and Curtin HD. Chapter 2: Embryology, Anatomy, Physiology, and Imaging of the Sinonasal Cavities. in Head and Neck Imaging (5th ed.). Elsevier, 2011.
• Werner JA, Dünne AA, Myers JN. Functional anatomy of the lymphatic drainage system of the upper aerodigestive tract and its role in metastasis of squamous cell carcinoma. Head Neck. 2003 Apr;25(4):322-32.