sinus

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Related to ethmoid sinus: Sphenoid sinus

sinus,

cavity or hollow space in the body, usually filled with air or blood. In humans the paranasal sinuses, mucus-lined cavities in the bones of the face, are connected by passageways to the nose and probably help to warm and moisten inhaled air. When drainage from them is blocked, as after a cold, these sinuses often become infected, a condition called sinusitis. The accumulation of pus results in pressure, headaches, pain, and general discomfort. In invertebrates one of the spaces among the muscles and viscera through which blood returns to the heart is also known as a sinus.

sinus

(sÿ -nŭs) A semienclosed break along the borders of a lunar mare or in a scarp. The word is used in the approved name of such a feature on the Moon. (Latin: bay)

Sinus

 

in anatomy, a cavity, protrusion, or long closed channel. In vertebrates (including man), the term “sinus” refers to a channel filled with venous blood in the dura mater. The cavity in some cranial bones is also called a sinus. [23–1297–]

sinus

[′sī·nəs]
(biology)
A cavity, recess, or depression in an organ, tissue, or other part of an animal body.

sinus

1. Anatomy
a. any bodily cavity or hollow space
b. a large channel for venous blood, esp between the brain and the skull
c. any of the air cavities in the cranial bones
2. Pathol a passage leading to a cavity containing pus
3. Botany a small rounded notch between two lobes of a leaf, petal, etc.
4. an irregularly shaped cavity
References in periodicals archive ?
Unlike Squamous cell carcinoma which is most commonly seen in Maxillary sinus, Paranasal Neuroendocrine Carcinomas are mostly observed in ethmoid sinus.
In the etiopathogenesis, we think that this mucocele developed with obstruction of the frontal sinus ostium following trauma and led to bone damage by expanding towards the ethmoid sinus, because there was a history of trauma two years previously.
Gras-Cabrerizo JR, Montserrat-Gili JR, Leon-Vintro X, et al Treatment results for ethmoid sinus carcinoma.
The first major possibility is that sinusitis produced an expansile infected mass within one of the sinuses adjacent to the orbit and that this mass either expanded the sinus or broke through the wall of the sinus to compress either a cranial nerve or an extraocular muscle, in Sisler's case, the ethmoid sinus (located between the eyes) was reported to be infected, so that the mass would presumably have arisen within that particular sinus.
The mass was adherent to nasal septum, maxillary and ethmoid sinus walls making it difficult to ascertain the site of origin.
Endoscopic surgery has largely replaced the external fronto-ethmoidectomy procedure for recurrent nasal polyposis, frontal and ethmoid sinus disease, mucoceles and fungal sinusitis.
Examination of the right and left ethmoid sinus specimens revealed mild chronic inflammation with rare eosinophils.
1) Sphenoid sinus surgery can be performed with a microdebrider either transethmoidally through the posterior ethmoid sinus or transnasally through the anterior wall of the sphenoid sinus.
The company markets two steroid releasing implants, Propel and Propel mini, which are used in patients with chronic sinusitis undergoing ethmoid sinus surgery.
Most commonly diseased sinus is maxillary sinus 86%, ethmoid sinus 80%, frontal sinus 54%, sphenoid sinus 48%.
Magnetic resonance imaging (MRI) demonstrated a round mass in the left nasal cavity, involving the sphenoid sinus and ethmoid sinus and compressing the left orbit and nasal septum, but without intracranial component (Figure 1).