Ethmoid bulla

Ethmoid bulla
Ethmoid bulla
Details
Identifiers
Latin	bulla ethmoidalis
TA98	A06.1.02.026; A02.1.07.015
TA2	3150
FMA	57487
	Anatomical terminology [edit on Wikidata]

The ethmoid bulla (or ethmoidal bulla) is an elevation on the lateral wall of the middle meatus of the nose. It is produced by middle ethmoidal cells.^{[citation needed]} It develops during the first trimester of gestation, and varies significantly based on the size of air cells.

Structure[]

The ethmoid bulla is on the lateral wall of the middle meatus of the nose.^[1] It is produced by middle ethmoidal cells,^{[citation needed]} which are contained within this bulla, and open on or near to it (often just below it).

Just below the bulla is a curved fissure, the hiatus semilunaris. The maxillary sinus also opens below the bulla.^[1]^[2] It is the largest among the middle ethmoidal cells.^{[citation needed]}

Development[]

The ethmoid bulla begins to develop between 8 weeks and 12 weeks of gestation.^[2]

Variation[]

The size of the bulla varies with that of its contained cells. The bulla may be a pneumatised cell or a bony prominence found in middle meatus.

References[]

^ ^a ^b Gray, Henry; Lewis, Warren H. (1918). Anatomy of the nose of the Human Body (20th Edition). p. 195.
^ ^a ^b Wang, Rong-Guang; Jiang, Si-Chang (1997-01-01). "The Embryonic Development of the Human Ethmoid Labyrinth from 8-40 Weeks". Acta Oto-Laryngologica. 117 (1): 118–122. doi:10.3109/00016489709118002. ISSN 0001-6489.

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[:0-1] Gray, Henry; Lewis, Warren H. (1918). Anatomy of the nose of the Human Body (20th Edition). p. 195.

[:1-2] Wang, Rong-Guang; Jiang, Si-Chang (1997-01-01). "The Embryonic Development of the Human Ethmoid Labyrinth from 8-40 Weeks". Acta Oto-Laryngologica. 117 (1): 118–122. doi:10.3109/00016489709118002. ISSN 0001-6489.

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