branchial sinus


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to branchial sinus: branchial fistula

branchial sinus

an abnormal cavity or space that opens externally on the inferior third of the neck, anterior to the sternocleidomastoid muscle; it usually results from failure of the second pharyngeal groove and cervical sinus to obliterate.
Mentioned in ?