sinus

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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 ?
43) The sinus tract courses from the apex of the pyriform sinus medial and inferior to the recurrent laryngeal nerve, loops superior to the hypoglossal nerve, travels along the course of the recurrent laryngeal nerve within the trachesophageal groove, wraps around the aortic arch on the left or the subclavian artery on the right.
Cutaneous dental sinus tract, a common misdiagnosis: a case report and review of the literature.
3) These patients usually present with progressive pain, fever, swelling and draining sinus tracts.
She was found to have a dermal sinus tract, where her skin tag had been removed, that extended into the dura.
They are particularly evident with second arch anomalies, which typically occur as cysts, sinus tracts, or fistulae along a course from the tonsillar fossa, internally, to the skin anterior to the sternocleidomastoid muscle, externally.
Once the endodontic infection is treated successfully, discharge form the sinus tract will cease within a few weeks.
Making the diagnosis of a draining sinus tract in the setting of a chronic dental infection can be challenging for several reasons.
Breakdown of a branchial cyst wall will result in an internally communicating sinus tract.
Adenocarcinoma occurring in association with a chronic sinus tract and biliary fistula.
It consists of a midline groove of atrophic, erythematous skin with a nipple-like projection at the cephalic end and an inferiorly oriented sinus tract at the caudal end.
A fistula has an opening to both gut and skin, while a sinus tract is open to either but not both.
2) The failure of a branchial cleft to close results in the development of a persistent sinus tract.