PMC3864171_01
Mildly hyperintense and "salt and pepper" looking lesion, located superior to left carotid bifurcation level between left ICA and ECA, is observed on T2 weighted axial (A) and coronal (B) imaging. Hypointense lesion on T1 weighted axial (C) imaging. Postcontrast T1-weighted axial (D) images demonstrates increased contrast enhancement of lesion. On axial images, atrophy is observed on left half of tongue. Lesion pushed left ICA to anterior and medial.
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Moreover, there was atrophy in the left half of the tongue (Figure 1).
Coronal postcontrast T1-weighted images (A) shows increased contrast enhancement. Coronal multiplanar reformation (B) and maximum intensity projection (C) contrast-enhanced MR angiography images demonstrates lesion localized superior to the carotid bifurcation level, between left ICA and ECA. Lesion pushed left ICA to anterior and medial.
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The neck mass displaced the left ICA anteriorly and medially (Figure 2).
Paraganglioma. Eosinophilic cytoplasm cells are observed as nested arbitrarily along with fibrovascular septa (HE x50) (A) Zellballen formation is observed for paraganglioma (HE x100) (B).
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Following histopathological evaluation, the lesion was diagnosed as paraganglioma (Figure 3).