Ultrasound may be helpful in the diagnosis of Riedel's thyroiditis. Findings on an ultrasound suggestive of Riedel's thyroiditis include:    Hypoechogenicity Thyroid nodule infiltrating adjacent structures Absence of blood flow on Doppler ultrasound
What is the correlation between Riedel's thyroiditis and echocardiography and ultrasound?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What is the correlation between Riedel's thyroiditis and echocardiography and ultrasound? [/INST] \n Ultrasound may be helpful in the diagnosis of Riedel's thyroiditis. Findings on an ultrasound suggestive of Riedel's thyroiditis include:    Hypoechogenicity Thyroid nodule infiltrating adjacent structures Absence of blood flow on Doppler ultrasound</s>