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Estimated percentage of testing positive for a germline mutation in a patients with a family history of primary hyperparathyroidism by age, sex, and presence of multigland disease. PHPT, primary hyperparathyroidism; MGD, multigland disease; SGD, single gland disease. Numbers above histogram represent percentage of patients with a germline mutation (MEN1, CDC73, or GCM2). Age cutoff ≤ or > 45 years.
