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Fig. 5A —15-year-old girl with hyperparathyroidism due to parathyroid
hyperplasia. Sonograms show four slightly enlarged parathyroid glands
(arrows): right superior (A), right inferior (B), left
superior (C), and left inferior (D). Patient subsequently
underwent four-gland exploration and subtotal parathyroidectomy, leaving
portion of right superior gland. Largest of resected hyperplastic glands
weighed only 322 mg. Relatively small size of typical hyperplastic glands
decreases sensitivity of sonography.
