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Figure 2a. Parathyroid imaging in MEN: MR imaging. (a) Parathyroid adenoma. Coronal T2-weighted MR image shows a right parathyroid adenoma with homogeneous high signal intensity (arrow) in the neck. (b, c) Parathyroid adenoma in a patient who presented with persistent hypercalcemia. The patient had previously undergone subtotal parathyroidectomy. (b) Coronal T1-weighted MR image shows a bilobed, low-signal-intensity, left mediastinal parathyroid adenoma (arrow) adjacent to the aortic arch. (c) Corresponding technetium 99m (99mTc)–sestamibi (MIBI) scintigram shows increased radiotracer uptake within the adenoma.
