CASE 287: CAROTID PSEUDOANEURYSM, Dr PHAN THANH HẢI, MEDIC MEDICAL CENTER, HCMC, VIETNAM

Man  57 yo  detected  one mass at right  neck in pulsation.

Ultrasound  first at one clinic reported that  was a pseudoaneurysm  of  right  common carotid with thrombus inside  ( because  it had color inside this mass on  doppler).( see us 1, us 2).

Ultrasound  review at MEDIC:   it is a cystic mass  of  right lobe  thyroid gland without   Doppler  flow inside)  See  ( image us2, us4)

Reference from doctor  requested  CT angio of carotid  artery to make  sure  diagnosis of normal  carotid artery.

FNAC  was done for this thyroid mass which was to be a colloidal cyst.

What is atefact on color Doppler to make the misdiagnosis at the first ultrasound?

What is setting  parameter of  ultrasound color Doppler for elimination  this atefact?