What is the normal width of the thyroid gland?

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Prepare for the Ultrasound Registry (URR) Exam with focused practice on abdomen topics. Use flashcards and multiple choice questions with hints and explanations. Achieve exam success with comprehensive study materials.

Multiple Choice

What is the normal width of the thyroid gland?

Explanation:
Measuring thyroid size on ultrasound focuses on the width of a normal lobe. In an adult, each thyroid lobe typically measures about 1.5 to 2 cm in width (with lengths around 4–6 cm and thickness about 2–3 cm; the isthmus is usually 2–6 mm thick). So, the normal width best fits 1.5–2 cm. A width of 0.5–1 cm would be unusually narrow, 1.0–1.2 cm is slightly smaller than average, and 2.5–3 cm would be larger than normal and could indicate enlargement or goiter.

Measuring thyroid size on ultrasound focuses on the width of a normal lobe. In an adult, each thyroid lobe typically measures about 1.5 to 2 cm in width (with lengths around 4–6 cm and thickness about 2–3 cm; the isthmus is usually 2–6 mm thick). So, the normal width best fits 1.5–2 cm. A width of 0.5–1 cm would be unusually narrow, 1.0–1.2 cm is slightly smaller than average, and 2.5–3 cm would be larger than normal and could indicate enlargement or goiter.

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