99mTc Sestamibi, 875 MBq
CLINICAL INDICATION: Hyperparathyroidism for localisation.
TECHNICAL PROCEDURE AND RESULTS
Static and SPECT images were acquired at 15 min and 3 hours. Delayed CT-SPECT was performed.
Initial images show prominent activity at the inferior aspect of the left thyroid lobe. The rest of the thyroid gland shows uniform uptake.
Delayed images show focally retained activity at the inferior aspect of the left thyroid lobe lower pole. SPECT/CT localises this focal uptake to an intensely Sestamibi-avid soft tissue nodule posteroinferior to the left thyroid lobe, adjacent to T1 vertebral body. The rest of the thyroid gland exhibits normal tracer washout. No other abnormal uptake is detected in the neck or thorax.
OVERALL IMPRESSION
Intensely Sestamibi-avid soft tissue nodule posteroinferior to the left thyroid lobe is consistent with a left lower parathyroid adenoma.