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 ?
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.
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.
2) According to the most widely accepted theory regarding branchial remnants, branchial cleft anomalies are the result of a persistent branchial apparatus secondary to either (1) an incomplete closure of either clefts or pouches or (2) the failure of the second and fourth arches to obliterate the cervical sinus of His.