mastoid antrum


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Related to mastoid antrum: epitympanic recess, tegmen tympani, suprameatal triangle

mastoid antrum

[′ma‚stȯid ′an·trəm]
(anatomy)
An air-filled space between the upper portion of the middle ear and the mastoid cells.
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age (yr) Site complaint 1 F/14 Squamous portion Swelling in the left of the temporal bone temporal region 2 F/15 Mastoid antrum None (found in the mastoid antrum during cortical mastoidectomy) 3 F/12 Mastoid portion Swelling in the of the temporal bone mastoid region 4 F/15 Mastoid portion Swelling in the of the temporal bone mastoid region 5 M/14 Mastoid portion Swelling in the of the temporal bone mastoid region 6 F/12 External auditory Swelling in the EAC canal (EAC) 7 M/15 EAC Decreased hearing 8 M/12 EAC None (found during removal of impacted wax) 9 M/14 EAC None (found during routine examination) Duration of Pt.
The mastoid antrum is a relatively constant bilateral structure, even in cases of chronic otitis media with sclerotic mastoids.
A soft, grayish, well-demarcated mass filled the mastoid antrum, mastoid tip, aditus ad antrum, and epitympanum.
The disease was meticulously cleared from the middle ear and mastoid antrum.
CT revealed that the tumor filled the middle ear, extended to the mastoid antrum, and was wrapped around the ossicular chain.
The mastoid antrum was filled with bumpy, yellowish tissue that resembled a cholesterol granuloma.