PMC7386277_01
: non-contrast (A) and contrast-enhanced (B) CT images; the mass was located lateral to the right submandibular region contrast-enhanced CT demonstrated enhancement of intratumoral blood vessels
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F1
No evidence of cystic or necrotic degeneration was present in the CT (Figure 1).
: MR images showed masse was located later to the right submandibular region (arrow), homogeneous hypo intensity on T1-WI (A), heterogeneous hyper intensity on T2-WI (B), and heterogeneous enhancement on contrast-enhanced T1-WI (C)
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F2
With normal flow velocities in the internal and external carotid arteries (Figure 2), the lesion was suspected of neurogenic tumor on the basis of the above imaging findings.
: intraoperative, the tumor was well-encapsulated and continuous with the descending branch of the hypoglossal nerve
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F3
ECA were controlled at distance from the mass and the hypoglossal nerve was identified and exposed along all its course crossing the carotid bifurcation. Intraoperatively, the tumor was wellen capsulated and delimited, arose from the descending branch of the hypoglossal nerve and was easily detached from the ICA and ECA. En bloc resection of the mass together with the descending branch of the hypoglossal nerve was performed (Figure 3).