Figure 1.

Autotransplanted parathyroid gland and parathyromatosis. A 70-year-old female presents with hyperparathyroidism after remote thyroidectomy. Coronal (a) and axial (b) four-dimensional computed tomography (4DCT) shows a hyperenhancing parathyroid gland (thick arrows) superficial to the right sternocleidomastoid muscle (SCM). Power Doppler ultrasound (c) of the autotransplanted hypoechoic nodule shows a polar feeding vessel (thin arrow) and peripheral rim of vascularity. Additional well-circumscribed mostly hypoechoic nodules consistent with multiple implants of parathyroid tissue (d) (red arrows) are also visualized.