Normal parathyroid width is which of the following?

Normal parathyroid width is which of the following?

• A. 3 to 4 mm
• B. 1 to 2 mm
• C. 5 to 6 mm
• D. 7 to 8 mm

Answer: (A)

Normal parathyroid width is 3 to 4 mm. Parathyroid glands are very small structures located behind the thyroid, and when you can visualize them on ultrasound their width typically falls in this 3–4 mm range. Values larger than about 5 mm would raise concern for enlargement such as adenoma or hyperplasia, while 1–2 mm would be considered smaller than usual. The other options exceed the typical normal width.

Normal parathyroid width is 3 to 4 mm. Parathyroid glands are very small structures located behind the thyroid, and when you can visualize them on ultrasound their width typically falls in this 3–4 mm range. Values larger than about 5 mm would raise concern for enlargement such as adenoma or hyperplasia, while 1–2 mm would be considered smaller than usual. The other options exceed the typical normal width.