cervical sinus


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Related to cervical sinus: Branchial cleft cyst

cervical sinus

[′sər·və·kəl ′sī·nəs]
(embryology)
A triangular depression caudal to the hyoid arch containing the posterior visceral arches and grooves.
References in periodicals archive ?
Before the first and second branchial arches meet the epicardial ridge, an ectoderm-lined cervical sinus (the sinus of His) is formed; this sinus normally disappears as maturation continues.
The vestigial remnant theory, which is most widely accepted, states that failure of a branchial cleft, branchial pouch, or the cervical sinus to obliterate during embryogenesis can result in a cyst.
Persistence of the cervical sinus (of His) or an incomplete formation or rupture of the closing branchial plate between clefts and pouches results in a branchial anomaly.