Which statement about carotid body tumors is most accurate?

Which statement about carotid body tumors is most accurate?

• A. They are slow-growing and highly vascular
• B. They are avascular
• C. They originate from the tunica media of the artery
• D. They are best supplied by the vertebral artery

Answer: (A)

Carotid body tumors are paragangliomas that arise from chemoreceptor tissue at the carotid bifurcation. They typically grow slowly, which explains their often subtle or gradual presentation. Yet they are highly vascular because they recruit a rich arterial blood supply from branches of the external carotid artery, making them notable on imaging as hypervascular lesions that can splay the internal and external carotid arteries (a characteristic finding). They are not avascular, they do not originate from the tunica media of the artery, and they are not primarily supplied by the vertebral artery. So the statement that best fits their behavior is that they are slow-growing and highly vascular.

Carotid body tumors are paragangliomas that arise from chemoreceptor tissue at the carotid bifurcation. They typically grow slowly, which explains their often subtle or gradual presentation. Yet they are highly vascular because they recruit a rich arterial blood supply from branches of the external carotid artery, making them notable on imaging as hypervascular lesions that can splay the internal and external carotid arteries (a characteristic finding). They are not avascular, they do not originate from the tunica media of the artery, and they are not primarily supplied by the vertebral artery. So the statement that best fits their behavior is that they are slow-growing and highly vascular.