Parathyroid scintigraphy

Question 1

What radiopharmecutical is used for parathyroid scintigraphy?

Answer 1

99mTc -sestamibi

Question 2

99mTc-sestamibi is used to look for?

Answer 2

increased metabolism such as hyperfunctioning parathyroid glands

Ectopic parathyroid tissue

Question 3

What allows you to tell the difference between hyperfunctioning parathyroid and thyroid?

Answer 3

99mTc sestamibi washes out of the thyroid first (thyroid phase vs parathyroid phase)