The sonographic examination of hyperplastic parathyroid glands is a well-known and appreciated technique. However, its diagnostic contribution is still somehow inadequate, due to the difficult differential diagnosis of the various solid hyperechoic nodular structures in the neck and to the presence of frequently ectopic glands. The combined use of B-mode and color-Doppler US allows the vascular features of suspicious parathyroid nodules to be satisfactorily demonstrated. Higher sensitivity and specificity than conventional US are the main advantages of this technique. Still, further research is needed for B-mode color-Doppler US to actually replace fine needle biopsy in confirming the diagnosis.
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