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 ?
Six months after radiotherapy, however, the lymphoma relapsed in the ethmoid sinus.
The diagnosis of TCRBCL of the ethmoid sinus was established.
1,2] Nasopharynx has been occasionally cited as an initial site of presentation in a few cases with TCRBCL; however, to our knowledge, ethmoid sinus has never been mentioned in any of the reports.
There was a 5 x 4 x 3-cm, gray, well-encapsulated cystic mass in the left ethmoid sinus and nasal cavity, which extended to both the sphenoid sinuses and skull base.
4,5] Clinically, the present case was similar to the previously reported case of the maxillary sinus lesion that extended to the ethmoid sinus and nasal cavity and compressed the floor of the orbit, causing pain and unilateral proptosis.
Combined aplasia of sphenoid, frontal, and maxillary sinuses with hypoplasia of the ethmoid sinus.
As the right medial periorbita was opened, a tense, thin-walled, fluid-filled mass that measured approximately 8 x 12 mm herniated into the ethmoid sinus.
The patient was taken to surgery, where--after removal of the uncinate process on the left side--a well-defined opening was found in the anterior wall of the ethmoid bulla leading into the ethmoid sinus (figure, G).
Sinus CT revealed mucosal thickening in the left ethmoid sinus, with an almost totally opacifled ethmoid labyrinth.
Sphenoid and maxillary mucoceles are rarer, and ethmoid sinus mucoceles almost always occur in conjunction with sphenoid and frontal mucoceles.
We report a case of this neoplasm in the ethmoid sinus.
In this report, we describe what we believe is the first reported case of a fibromyxomatous spindle-cell neoplasm, not otherwise specified, in the ethmoid sinus.