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Sonographic Evaluation of the Thyroid

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Questions and Answers

Where is the thyroid gland located?

In the anteroinferior neck at the level of the thyroid cartilage (correct)

In the superior neck at the level of the cricoid cartilage

In the posterior neck

In the mid-neck at the level of the laryngeal prominence

What is the typical shape of the thyroid gland?

Pyramidal

Triangular

Elliptical (correct)

Rectangular

What is the normal size of the thyroid gland in a newborn?

18 to 20 mm (correct)

30 to 35 mm

10 to 12 mm

25 to 30 mm

What is the normal volume of the thyroid gland in adults?

18.6 ± 4.5 ml Signup and view all the answers

What is the position of the patient during sonographic evaluation of the thyroid?

Supine position with a pillow under both shoulders to provide moderate hyperextension of the neck Signup and view all the answers

What type of transducer is used in sonographic evaluation of the thyroid?

High-frequency linear-array transducer Signup and view all the answers

What is the relationship between the esophagus and the trachea?

The esophagus is adjacent to the trachea with a hypoechoic rim surrounding an echogenic center Signup and view all the answers

What is the typical AP diameter of the isthmus?

4 to 6 mm Signup and view all the answers

Which of the following is true about the thyroid gland volume?

The volume is larger in males than in females Signup and view all the answers

How is the thyroid volume calculated?

Ellipsoid formula with a correction factor Signup and view all the answers