An Instructive Case Suggesting Cyclical Primary Hyperparathyroidism

  • MAKITA Noriko
    Departments of Endocrinology and Nephrology, University of Tokyo School of Medicine
  • IIRI Taroh
    Departments of Endocrinology and Nephrology, University of Tokyo School of Medicine
  • SATO Junichiro
    Departments of Endocrinology and Nephrology, University of Tokyo School of Medicine
  • FUKUMOTO Seiji
    Departments of Endocrinology and Nephrology, University of Tokyo School of Medicine
  • OKAZAKI Tomoki
    Departments of Endocrinology and Nephrology, University of Tokyo School of Medicine
  • YAMAZAKI Kiyomi
    Department of Endocrine Surgery, Tokyo Women's Medical University
  • OBARA Takao
    Department of Endocrine Surgery, Tokyo Women's Medical University
  • FUJITA Toshiro
    Departments of Endocrinology and Nephrology, University of Tokyo School of Medicine

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Abstract

We report an instructive case of primary hyperparathyroidism in which cyclical secretion of PTH may have caused repeated hypercalcemic crises followed by temporary remission with a spontaneous drop in PTH. A 64-year-old man was admitted to our hospital twice with severe hypercalcemic crisis (corrected calcium (cCa) 15.0 mg/dl and 16.7 mg/dl) accompanied by an increase in intact PTH (220 pg/ml and 470 pg/ml). During both events, the serum PTH values spontaneously dropped followed by remission of the hypercalcemia. The tumor, detected at the left-upper side, showed neither vascularity on ultrasound examination nor washout delay on MIBI scintigraphy, suggesting that two parathyroid adenoma infarctions had occurred. Cervical exploration was undertaken. The histopathological examinations confirmed that the tumor was parathyroid adenoma. Contrary to our expectation, however, it did not reveal necrotic tissue that would indicate recent infarction. The findings in this case may be explained by cyclical secretion of PTH from a parathyroid adenoma. Although cyclical Cushing's syndrome is well known, to our knowledge this is the first documented case suggesting cyclical primary hyperparathyroidism.<br>

Journal

  • Endocrine Journal

    Endocrine Journal 53 (3), 311-316, 2006

    The Japan Endocrine Society

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