[Neurohypophyseal diabetes insipidus. Anatomo-clinical correlations]

Area of Science:

• Endocrinology
• Neurology
• Radiology

Background:

• Diabetes insipidus is a condition characterized by excessive thirst and urination.
• Central diabetes insipidus arises from insufficient antidiuretic hormone production or release.
• Identifying the underlying cause of central diabetes insipidus is crucial for effective management.

Purpose of the Study:

• To investigate the association between neurological lesions and central diabetes insipidus.
• To evaluate the role of hyperprolactinemia as an indicator of central nervous system damage in these patients.
• To determine the importance of neuroradiological imaging in diagnosing neurohypophyseal diabetes insipidus.

Main Methods:

• Study included 18 patients (aged 14-60) diagnosed with diabetes insipidus using Robertson's test.
• All patients underwent computed tomography (C.T.) scanning.
• Prolactin (PRL) levels were evaluated basally and after thyrotropin-releasing hormone (TRH) stimulation.

Main Results:

• Twelve out of 18 patients (66%) exhibited neurological lesions, indicating secondary central diabetes insipidus.
• Six of these patients with neurological lesions also presented with hyperprolactinemia.
• The findings suggest a strong link between central nervous system damage and central diabetes insipidus.

Conclusions:

• The majority of central diabetes insipidus cases are associated with damage to the central nervous system.
• Hyperprolactinemia can be a sign of brain damage in some patients with central diabetes insipidus.
• Neuroradiological studies are essential for all patients diagnosed with neurohypophyseal diabetes insipidus.