Tumors of the Nose and Paranasal Sinus
The nose and paranasal (PNS) sinus have complex anatomy. It is related to various important structures that serve vital functions. It is essential to have clear understanding of the anatomy of this region to adequately address these tumors. The paranasal sinus is a common term used for group of sinuses that drains into the nasal cavities. The maxillary sinus is the largest and the most common to be involved in the pathology. The frontal, ethmoid, and sphenoid sinuses do get involved by pathology occasionally, and this mostly happens due to the extension of tumor from the nasal cavity. Primary tumor can occur in these sinuses but is relatively less common, and discussion in this chapter will focus on maxillary sinus and its pathology.