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[Hyperthyroidism and hypopituitarism: two incompatible diagnoses?]

Giorgio Bertola1, Roberto Bianchi1, Salvatore Giambona1

  • 1UO di Medicina I, ASST Rhodense, Presidio Ospedaliero di Garbagnate Milanese, Milano.

Recenti Progressi in Medicina
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Summary
This summary is machine-generated.

This case study highlights the rare alternation between hyperthyroidism and central hypothyroidism in a single patient. It demonstrates that these conditions, along with hypopituitarism, are not mutually exclusive diagnoses.

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Area of Science:

  • Endocrinology
  • Internal Medicine

Background:

  • Graves' disease is a common cause of hyperthyroidism.
  • Anterior pituitary insufficiency can present with various symptoms.

Observation:

  • A 67-year-old man with a history of nasopharyngeal carcinoma radiotherapy presented with hyperthyroidism due to Graves' disease.
  • Following treatment, he developed anterior pituitary insufficiency.
  • The patient experienced alternating episodes of hyperthyroidism and central hypothyroidism over six years.

Findings:

  • Thyrostatic therapy initially resolved hyperthyroidism.
  • Subsequent development of anterior pituitary insufficiency required hormone replacement therapy.
  • Recurrent hyperthyroidism correlated with rising TSH receptor antibodies (TRAb), followed by central hypothyroidism upon resolution.

Implications:

  • Hyperthyroidism and hypopituitarism can coexist and alternate in the same patient.
  • This case underscores the complexity of endocrine disorders and the need for comprehensive evaluation.
  • The interplay between autoimmune thyroid disease and pituitary function warrants further investigation.