- One of many small hollow spaces in the bones around the nose. Paranasal sinuses are named after the bones that contain them: frontal (the lower forehead), maxillary (cheekbones), ethmoid (beside the upper nose), and sphenoid (behind the nose). The paranasal sinuses open into the nasal cavity (space inside the nose) and are lined with cells that make mucus to keep the nose from drying out during breathing.
English dictionary of cancer terms . 2015.
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paranasal sinus — n any of various sinuses (as the maxillary sinus and frontal sinus) in the bones of the face and head that are lined with mucous membrane derived from and continuous with the lining of the nasal cavity … Medical dictionary
paranasal sinus — noun any of the paired sinuses in the bones of the face adjacent to the nasal cavity that are lined with mucous membrane that is continuous with the lining of the nasal cavities • Syn: ↑sinus paranasales, ↑nasal sinus • Hypernyms: ↑sinus * * *… … Useful english dictionary
paranasal sinus — noun A number of air filled spaces, or sinuses, within the bones of the skull and face. Syn: sinus paranasales … Wiktionary
paranasal sinus and nasal cavity cancer — Cancer that forms in tissues of the paranasal sinuses (small hollow spaces in the bones around the nose) or nasal cavity (the inside of the nose). The most common type of paranasal sinus and nasal cavity cancer is squamous cell carcinoma (cancer… … English dictionary of cancer terms
sinus — 1. [TA] A channel for the passage of blood or lymph, without the coats of an ordinary vessel; e.g., blood passages in the gravid uterus or those in the cerebral meninges. 2. [TA] A cavity or … Medical dictionary
Sinus paranasal — Pour les articles homonymes, voir Sinus. Sinus paranasal Sinus paranasaux … Wikipédia en Français
paranasal — adjective adjacent to the nasal cavities paranasal sinus • Pertains to noun: ↑nasal cavity * * * |parə+ adjective Etymology: para (I) + nasal : adjacent to the nasal cavities * * * /par euh nay … Useful english dictionary
sinus paranasales — noun any of the paired sinuses in the bones of the face adjacent to the nasal cavity that are lined with mucous membrane that is continuous with the lining of the nasal cavities • Syn: ↑paranasal sinus, ↑nasal sinus • Hypernyms: ↑sinus … Useful english dictionary
sinus — noun a) A pouch or cavity in any organ or tissue, especially the paranasal sinus. b) An abnormal cavity or passage such as a fistula, caused by the destruction of tissue … Wiktionary
Paranasal sinuses — Paranasal sinuses. Lateral projection of the paranasal sinus … Wikipedia