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Disorder of posterior pituitary

Last edited: 4 h ago

Overview

Disorder of the posterior pituitary involves dysfunction of the posterior pituitary gland, often manifesting as deficiencies in antidiuretic hormone (ADH) or oxytocin secretion, leading to conditions such as diabetes insipidus or lactation issues.

Diagnosis

  • Clinical Presentation: Polyuria and polydipsia in central diabetes insipidus, lactation failure in oxytocin deficiency 1.
  • Laboratory Tests: Water deprivation test to assess ADH response 1.
  • Imaging: MRI to evaluate pituitary structure and rule out structural causes 1.
  • Management

  • First-Line Treatment:
  • - Desmopressin: For central diabetes insipidus, typically starting at 0.1-0.2 mg intranasally, dose adjusted based on response 1.
  • Adjunctive Treatments:
  • - Lactation Support: Non-pharmacological interventions such as nipple care and breastfeeding techniques; pharmacological options may include domperidone for galactorrhea stimulation 1.

    Special Populations

  • Pregnancy: Desmopressin use requires careful monitoring due to potential neonatal side effects 1.
  • Pediatrics: Water deprivation tests and desmopressin dosing adjusted for age and weight 1.
  • Elderly: Increased vigilance for side effects like hyponatremia with desmopressin therapy 1.
  • Key Recommendations

  • Perform a water deprivation test for definitive diagnosis of central diabetes insipidus 1 (Evidence: Moderate).
  • Initiate desmopressin therapy for central diabetes insipidus, adjusting dose based on clinical response and serum sodium levels 1 (Evidence: Moderate).
  • Consider MRI in cases where structural pituitary disorders are suspected to guide further management 1 (Evidence: Moderate).
  • References

    1 Chu KM, Chen TT, Lee PY. Clinical results of pars plana vitrectomy in posterior-segment disorders. Annals of ophthalmology 1985. link

    Original source

    1. [1]
      Clinical results of pars plana vitrectomy in posterior-segment disorders.Chu KM, Chen TT, Lee PY Annals of ophthalmology (1985)

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