suprameatal triangle

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su·pra·me·a·tal tri·an·gle

[TA]
a triangle formed by the suprameatal spine, the inferior temporal line, and the vertical tangent to the posterior wall of the bony external auditory canal; used as a guide in mastoid operations to the mastoid antrum because the antrum lies directly medial to the suprameatal triangle.

su·pra·me·a·tal tri·an·gle

(sū'pră-mē-ā'tăl trī'ang-gĕl) [TA]
A triangle formed by the root of the zygomatic arch, the posterior wall of the bony external acoustic meatus, and an imaginary line connecting the extremities of the first two lines; used as a guide in mastoid operations.
Synonym(s): Macewen triangle.

suprameatal triangle

The triangle slightly above and behind the exterior auditory meatus. It is bounded above by the root of the zygoma and anteriorly by the posterior wall of the exterior auditory meatus.
See also: triangle

Macewen,

Sir William, Scottish surgeon, 1848-1924.
Macewen classification
Macewen drill
Macewen herniorrhaphy
Macewen operation
Macewen osteotomy
Macewen saw
Macewen sign - percussion of the skull gives a cracked-pot sound in cases of hydrocephalus. Synonym(s): Macewen symptom
Macewen symptom - Synonym(s): Macewen sign
Macewen triangle - Synonym(s): suprameatal triangle