MedlinePlus Medical Encyclopedia: Sinuses

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Sinuses

The sinuses are hollow cavities within the facial bones. Sinuses are not fully developed until after age twelve. When people speak of sinus infections, they are most frequently referring to the maxillary and frontal sinuses.

Update Date: 7/25/2007

Updated by: James L. Demetroulakos, M.D., F.A.C.S., Department of Otolaryngology, North Shore Medical Center, Salem, MA. Clinical Instructor in Otology and Laryngology, Harvard Medical School. Review provided by VeriMed Healthcare Network.

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