What is the normal length 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 length of the thyroid gland?

Explanation:
Normal thyroid size is assessed by measuring the length of each lobe along its long axis in a neutral neck. In an adult, each lobe is typically about 4 to 6 cm long, with widths around 2 to 3 cm and thickness about 1 to 2 cm. Therefore, the commonly cited normal length for a single thyroid lobe is 4–6 cm, which is why this choice is the best one. If a lobe is noticeably shorter than 4 cm or longer than 6 cm, it suggests atrophy or enlargement/goiter, respectively.

Normal thyroid size is assessed by measuring the length of each lobe along its long axis in a neutral neck. In an adult, each lobe is typically about 4 to 6 cm long, with widths around 2 to 3 cm and thickness about 1 to 2 cm. Therefore, the commonly cited normal length for a single thyroid lobe is 4–6 cm, which is why this choice is the best one. If a lobe is noticeably shorter than 4 cm or longer than 6 cm, it suggests atrophy or enlargement/goiter, respectively.

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