TY - CHAP M1 - Book, Section TI - Tumors of the Paranasal Sinuses A1 - Chan, Yvonne A1 - Goddard, John C. Y1 - 2019 N1 - T2 - K.J. Lee’s Essential Otolaryngology: Head and Neck Surgery, 12e AB - The paranasal sinuses develop from mesenchymal and ectodermal tissue.The sinuses define the spaces for tumor development and bony margins are barriers for spread to adjacent tissue.The numerous foramina in the ventral skull base host critical neurovascular structures and allow direct tumor spread. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/19 UR - accesssurgery.mhmedical.com/content.aspx?aid=1172370540 ER -