In this presentation, Jill Langer, MD, offers a comprehensive assessment of parathyroid ultrasound, beginning with practical matters (the relative advantages and disadvantages of the devices available, positioning the patient) before delving into the appearance, location and vascularity of typical parathyroid adenomas, the characteristics that distinguish parathyroid adenomas from cysts and metastatic lymph nodes and the features of parathyroid carcinoma.