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Medical Term:

cervical sinus


in young mammalian embryos a depression in the nuchal region caudal to the second pharyngeal arch, with the third and fourth pharyngeal arches and ectodermal grooves in its floor; normally it is obliterated after the second month, but occasionally cervical fistulae persist as vestiges of it.

Synonym(s): precervical sinus

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.