Hyperparathyroidism due to eutopic PTH secretion from an ectopic intrathymic parathyroid cyst.


Parathyroid cysts rarely cause hyperparathyroidism. In addition, they rarely occur in the thymus. We report a 56-year-old woman with hypertension on telmisartan and hydrochlorothiazide, who developed symptomatic hypercalcemia for a month. Initial serum calcium was 15.6 mg/dL, together with inappropriately elevated intact PTH at 437 pg/mL. Coincidentally, an… (More)


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