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Poststyloid Parapharyngeal Space
A 46-year-old woman presenting with a parapharyngeal mass in the left side of the neck that was detected incidentally. Ax, axial; CT, computed tomography; FS, fat saturated; SPECT, single-photon emission computed tomography.
A 61-year-old woman presenting with a mass in the left side of the neck. Ax, axial; FS, fat saturated.
DESCRIPTION OF FINDINGS
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Case A: An axial contrast-enhanced CT scan ( A ) demonstrates an enhancing mass displacing the left internal carotid artery anteriorly (arrow) with prominent internal vascularity. Axial postcontrast (with fat saturation, B) T1- and axial T2-weighted ( C ) images through the neck show an enhancing mass that is displacing the left carotid artery anteriorly with internal flow voids on the T2-weighted sequences. An octreotide scan with fused single photon emission CT images ( D ) demonstrate intense indium-111 octreotide uptake in the mass.
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Case B: Axial T2-weighted and contrast-enhanced T1-weighted images ( A and B ) demonstrate an enhancing, T2 hyperintense mass that displaces the carotid artery anteriorly (arrow). Signal characteristics are consistent with a schwannoma.
Diagnosis
Case A
Left glomus vagale
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