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Fig. 4 —52-year-old man who presented with hyperparathyroidism and
was referred for 99mTc sestamibi (740 MBq [20 mCi] IV) parathyroid
scintigraphy with SPECT/CT before anticipated minimally invasive radioguided
parathyroidectomy with intraoperative parathyroid hormone (PTH) monitoring.
SPECT/CT multiplanar and SPECT maximum-intensity-projection (MIP) (far right)
images reveal focus of uptake in unusual location adjacent to proximal left
common carotid artery (arrows). During curative surgery, 22-mg
ectopic left parathyroid gland was found within left carotid sheath. Surgeon
remarked that SPECT/CT information significantly enhanced preoperative
planning of surgical approach.
