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Related Experiment Videos

Triphasic AVP secretion in encephalopathy.

Y Hasegawa1, T Hasegawa, T Yokoyama

  • 1Division of Endocrinology and Metabolism, Tokyo Metropolitan Kiyose Children's Hospital, Japan.

Endocrinologia Japonica
|April 1, 1990
PubMed
Summary

A patient experienced rapid encephalopathy with triphasic changes in water balance, including diabetes insipidus (DI) and syndrome of inappropriate ADH secretion (SIADH). This suggests potential neurohypophyseal dysfunction due to supraopticohypophyseal tract damage.

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Area of Science:

  • Neuroscience
  • Endocrinology

Background:

  • Encephalopathy presents a diagnostic challenge, particularly when its etiology is unclear.
  • Disruptions in water balance, such as diabetes insipidus (DI) and syndrome of inappropriate ADH secretion (SIADH), can indicate underlying neurological or endocrine dysfunction.

Observation:

  • A patient with unexplained encephalopathy exhibited a rapid, triphasic clinical course.
  • The patient's condition progressed through distinct phases: initial DI, followed by SIADH, and concluding with a return to DI.
  • The rapid onset of unconsciousness and a state resembling "brain death" were noted within 24 hours.

Findings:

  • The observed triphasic pattern of DI and SIADH in encephalopathy is unusual.
  • This pattern mirrors findings in animal models with induced damage to the supraopticohypophyseal tract.

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Implications:

  • The case suggests a potential link between encephalopathy and neurohypophyseal dysfunction.
  • Supraopticohypophyseal tract damage may underlie the observed triphasic water balance disturbances.
  • Further research is warranted to explore the neuroendocrine mechanisms in severe encephalopathy.