Original contribution
Carotid lesions detected by B-mode ultrasonography in Takayasu's arteritis: “Macaroni sign” as an indicator of the disease

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Abstract

Twenty-three patients were studied to evaluate the clinical usefulness of high resolution B-mode ultrasonography in the detection of carotid lesions in patients with Takayasu's arteritis. In each patient the carotid arteries were examined using both B-mode ultrasonography (midfrequency of 7.5 MHz) and contrast angiography. In 19 of 23 patients, B-mode ultrasonography clearly demonstrated the characteristic circumferential arterial wall thickening of either one or both sides of the common carotid arteries as a macaroni-like, diffusely thickened intima-media complex. Conversely, contrast angiography demonstrated carotid lesions in only 13 of 23 patients. These results clearly show that B-mode ultrasonography is quite sensitive and superior in the detection of the characteristic thick intima-media complex of the common carotid artery in patients with Takayasu's arteritis, when compared with contrast angiography that is usually used for the definitive diagnosis of this disease.

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