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Fig. 1.
PDUS of a richly vascular carotid PGL
Fig. 2.
Low-resistance pattern of vascular flow within a PGL
Fig. 3.
Low-resistance pattern of vascular flow within the ipsilateral external carotid artery compared to ipsilateral internal carotid artery
Fig. 4.
CDUS of a poorly vascular neurofibroma
Fig. 5.
A well-defined, superficial, anechoic space with acoustic enhancement – typical branchial cleft cyst appearance
Fig. 6.
A well-defined, solid, homogeneous tumor with slight posterior enhancement – consistent with lipoma
Fig. 7.
B-mode US of a venous malformation: superficial, well-defined, hypoechoic spaces of an irregular shape
Fig. 8.
DUS of venous vascular flow in a venous malformation
Fig. 9.
An extracranial carotid artery aneurysm presenting as a well-demarcated, hypoechoic space with peripheral thrombi, connected to the external carotid artery
Fig. 10.
A well-defined, hypoechoic space with acoustic enhancement, adhering to the thyroid cartilage – an ultrasound appearance of a laryngocele
Fig. 11.
An external carotid artery aneurysm with visible turbulent vascular flow seen on CDUS (A) and PDUS (B)
Fig. 12.
A hypoechoic PGL situated in the carotid bifurcation, splaying the proximal aspects of its branches
Fig. 13.
Sarcoma neurogenes: visible absence of vascular flow and the tumor’s medial location to carotid arteries
Fig. 14.
CDUS of a well-defined, avascular cyst, located superficially to neck vessels, with visible fine internal reflexes and acoustic enhancement