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What is Lyre sign is seen in and explain in detail?
Carotid body tumour arises from the chemoreceptor cells in the carotid body, hence also called chemodectoma. Mostly presents after 40 years. It is a very slow-growing tumour and the history of mass in the neck may extend into several years. It presents as a painless swelling which is pulsatile.MRI angiography shows splaying of internal and external carotid aeries (Lyre's sign).Dhingra 6e pg: 392