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Thyrotropin secreting pituitary tumours: a cause of hyperthyroidism
  1. Ibrahim S Salti,
  2. Nuha Nuwayri-Salti,
  3. Ronald A Bergman,
  4. Sami I Nassar,
  5. Kamel F Muakkasah,
  6. Itaf Fakhri-Sahli
  1. Department of Internal Medicine, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
  2. Department of Human Morphology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
  3. Department of Surgery, Faculty of Medicine, American University of Beirut, Beirut, Lebanon

    Abstract

    Pituitary thyrotropin excess resulting in hyperthyroidism has been previously reported in only 25 patients, of whom 19 had a pituitary tumour. This report describes a patient in whom a thyrotropin-producing pituitary tumour was associated with triiodothyronine thyrotoxicosis. Hypophysectomy was followed by a prompt fall in serum thyrotropin and a return to a euthyroid state.

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