ethmoid


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ethmoid

 [eth´moid]
1. sievelike; cribriform.

eth·moid bone

[TA]
an irregularly shaped bone lying between the orbital plates of the frontal bone and anterior to the sphenoid bone of the cranium; it consists of two lateral ethmoidal labyrinths of thin plates enclosing air cells, attached above to a perforated horizontal lamina, the cribriform plate, from which descends a median, vertical, perpendicular plate in the interval between the two labyrinths; the bone articulates with the sphenoid, frontal, maxillary, lacrimal, and palatine bones, the inferior nasal concha, and the vomer; it enters into the formation of the anterior cranial fossa, the orbits, and the nasal cavity, forming the supreme, superior, and middle conchae of the latter.

ethmoid

(ĕth′moid′) also

ethmoidal

(ĕth-moid′l)
adj.
Of, relating to, or being a light spongy bone located between the ocular orbits, forming part of the walls and septum of the superior nasal cavity, and containing numerous perforations for the passage of the fibers of the olfactory nerves.
n.
The ethmoid bone.

eth·moid

(eth'moyd) [TA]
1. Resembling a sieve.
2. Relating to the ethmoid bone.
Synonym(s): ethmoidal.
[G. ēthmos, sieve, + eidos, resemblance]
References in periodicals archive ?
However, the frequencies of frontal, maxillary and ethmoid sinus lesions were significantly higher in winter than in summer.
Primary ethmoid SNSCCs make up 5-25% of all sinus malignancies.
Approximately 5065% rise in maxillary sinuses, 10-25% in the ethmoid sinuses and 15-30% in the nasal cavity.
The dorsal nasal turbinate was the longest and largest one and extended from dorsal part of ethmoid crest to level of 3rd transverse ruga of hard palate.
The maxillary, ethmoid (divided into anterior and posterior cells) frontal and sphenoid sinuses.
The proportion of mucoceles located in the maxillary and ethmoid sinuses were both 30.6% ( n = 49).
Biopsy revealed small cell carcinoma of the ethmoid and sphenoid sinuses of the right side, and further investigations demonstrated lymph node and multiple bone metastases.
The maxillary sinus is the first paranasal sinus to develop from the ethmoid sinuses.
Plain radiographs do not allow adequate evaluation of the osteomeatal complex or of the sphenoid and ethmoid sinuses because of overlapping anatomic structures.
We present a case of 65 years old patient with metastatic prostate cancer who presented to us with left ethmoid sinuses and orbital metastasis causing ipsilateral proptosis.
Rennels described as a "poor engineering feature," only a very thin layer of bone--the lamina papyracea, or paper lamina--separates the ethmoid air cells from the posterior orbit.