PMC4529648_01
Coronal maximum intensity projection (MIP) of negative 99mTc-sestamibi SPECT and axial SPECT-CT (1a). Coronal MIP and axial PET-CT (1b) performed with 18F-fluorocholine clearly show a hotspot located posterior to the left upper thyroid lobe.
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Conventional pre-operative imaging studies (US and 99mTc-sestamibi SPECT-CT (Fig. 1a)) did not reveal a parathyroid adenoma. PET-CT of the neck and mediastinum was performed 30 min after injection of 171MBq FCH. PET-CT showed intense focal FCH accumulation in a hypodense lesion posterior to the left upper thyroid lobe (Fig. 1b).