PMC9800786_01
Computed tomography angiography showing intensely enhanced masses at the level of bilateral carotid bifurcations. Black arrows point to the internal carotid artery, white arrows point to the external carotid artery, and red arrowheads point to the carotid body tumor.
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F1
A smaller mass measuring 1.1 x 0.9 x 0.9 cm was present on the left in a similar location (Figure 1).
Intraoperation view of right carotid body tumor resection. A mass at the bifurcation splayed the internal carotid artery (black arrow) and external carotid artery (white arrow).
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F2
A longitudinal incision along the anterior border of the right sternocleidomastoid muscle was made to expose the carotid bifurcation and the tumor (Figure 2).
Histopathological examination revealed the zellballen pattern characteristic of paraganglioma (A). Immunohistochemical results were positive for synaptophysin (B), chromogranin A (C), and CD56 (D) in the tumor cells and S-100 protein in the supporting cells (E).
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F3
Histopathological examination revealed a zellballen pattern characteristic of paraganglioma and did not show any evidence of malignancy (Figure 3A). Immunohistochemical results were positive for synaptophysin, chromogranin A, and CD56 in the tumor cells and S-100 protein was present in the sustentacular cells (Figures 3B-E).