Variant Type | Description |
---|---|
Arterial | |
Noncommon trunk | Facial, lingual, and superior thyroid arteries arise separately from the ECA |
Truncus linguofacialis | Facial and lingual arteries arise from the ECA in a common trunk |
Truncus thyrolingualis | Superior thyroid and lingual arteries arise from the ECA in a common trunk |
Venous | |
Thyrolinguofacialis | Facial, lingual, and superior thyroid veins form a thyrolinguofacialis vein |
Linguofacialis | Facial and lingual veins form a venous stem |
Thyrofacialis | Facial and superior thyroid veins join together, and separate lingua l vein joins into the IJV |
Nonfacial vein | Superior thyroid and lingual veins join together into the IJV |
Separation | Lingual and superior thyroid veins fuse independently with the IJV |
Note:—ECA indicates external carotid artery; IJV, internal jugular vein.