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Related Experiment Videos

Holoprosencephaly: a case presenting with adipsic hypernatremia

S M Wang1, Y J Chen

  • 1Department of Pediatrics, College of Medicine, National Cheng Kung University, Tainan, Taiwan, R.O.C.

Zhonghua Minguo Xiao Er Ke Yi Xue Hui Za Zhi [Journal]. Zhonghua Minguo Xiao Er Ke Yi Xue Hui
|May 1, 1996
PubMed
Summary
This summary is machine-generated.

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Holoprosencephaly may impair hypothalamic osmoreceptors, affecting thirst and vasopressin regulation in infants. This case highlights a potential link between brain malformation and fluid balance disorders.

Area of Science:

  • Pediatric Neurology
  • Developmental Neuroscience
  • Endocrinology

Background:

  • Holoprosencephaly (HPE) is a congenital brain malformation with variable clinical presentations.
  • Disorders of thirst regulation and antidiuretic hormone (ADH) secretion can lead to severe hypernatremia.
  • The hypothalamic osmoreceptors play a crucial role in sensing plasma osmolality and triggering thirst and ADH release.

Observation:

  • An 11-month-old infant with lobar holoprosencephaly presented with hypernatremia, microcephaly, and developmental delay.
  • The infant exhibited a lack of thirst despite significantly elevated plasma osmolality (>318 mOsm/kg).
  • Magnetic resonance imaging confirmed lobar holoprosencephaly.

Findings:

  • Plasma osmolality normalized following forced hydration and administration of a vasopressin analogue.

Related Experiment Videos

  • The findings suggest a potential defect in hypothalamic osmoreceptors controlling thirst and vasopressin secretion in this patient with holoprosencephaly.
  • This indicates a possible association between holoprosencephaly and impaired osmoregulation.

    • Implications:

    • Holoprosencephaly may be associated with hypothalamic dysfunction, specifically affecting osmoreceptor sensitivity.
    • Early identification and management of fluid and electrolyte balance are critical in infants with holoprosencephaly.
    • Further research is warranted to elucidate the mechanisms linking brain malformations to neuroendocrine disorders.