Article Figures & Data
Figures
- Fig 1.
Typical MR imaging signal characteristics of a VM (white arrow) in the right PPS of a 56-year-old woman. A, Axial fat-suppressed T2-weighted MR imaging depicts a well-circumscribed lobulated markedly hyperintense PPS mass. B, Axial T1-weighted MR imaging shows the mass as isointense to skeletal muscle.
- Fig 2.
Variable enhancement patterns of PPS VMs (white arrows). A, Axial T1-weighted fat-suppressed postcontrast MR imaging in a 34-year-old man demonstrates diffuse homogeneous enhancement. B, Axial T1-weighted fat-suppressed postcontrast MR imaging from a 66-year-old woman illustrates a diffuse heterogeneous enhancement pattern. C, Axial T1-weighted fat-suppressed postcontrast MR imaging from a 61-year-old woman depicts stippled enhancement. Axial contrast-enhanced CT (D), axial T1-weighted fat-suppressed postcontrast MR imaging (E), and coronal T1-weighted fat-suppressed postcontrast MR imaging (F) from a 56-year-old woman. The axial CT and MR imaging demonstrate focal central enhancement, while the coronal image, which was acquired after additional time had elapsed following the intravenous contrast infusion, illustrates progressively more diffuse contrast enhancement.
- Fig 3.
Clinicopathologic correlation for a right PPS VM in a 61-year-old woman. A, Intraoral photograph demonstrates subtle right pharyngeal fullness with mild leftward deviation of the uvula. B, Coronal fat-suppressed T2-weighted MR imaging demonstrates a homogeneously hyperintense right PPS mass. C, Axial T1-weighted MR imaging depicts a round, well-circumscribed mass that is minimally hyperintense relative to skeletal muscle with effacement of the right parapharyngeal fat. D, Intraoral sonography illustrates the close relationship to the medial pterygoid muscle and the internal carotid artery. The VM is slightly hyperechoic compared with skeletal muscle. E, Gross pathologic specimen demonstrates the lobulated shape of this VM, correlating with the sonographic findings. F, Hematoxylin-eosin-stained photomicrograph illustrates nonanastomosing dilated endothelial-lined spaces, and the endothelial cells lack atypia. These findings are consistent with VM. VM (arrow), medial pterygoid muscle (asterisk), internal carotid artery (arrowhead).
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