Hypothalamic hypothyroidism causing spastic paraplegia: recovery following thyroid medication

Area of Science:

• Neurology
• Endocrinology
• Neuroendocrinology

Background:

• Spastic paraplegia is a neurological disorder characterized by lower limb spasticity and weakness.
• Hypothalamic insufficiency involves dysfunction of the hypothalamus, a key brain region regulating hormonal balance and autonomic functions.

Observation:

• A 63-year-old woman presented with long-standing spastic paraplegia and evidence of long tract neurological disturbances.
• She was diagnosed with hypothyroidism, partial diabetes insipidus, hyperprolactinemia, and gonadotropin deficiency, all indicating hypothalamic origin.

Findings:

• Hormone replacement therapy, including thyroxine and prednisone, led to a complete remission of her neurological abnormalities.
• This case demonstrates a novel association between spastic paraplegia and hypothalamic insufficiency.

Implications:

• Hypothalamic disease should be considered in the differential diagnosis of spastic paraplegia, especially when the cause is unclear.
• This finding highlights the intricate connection between the endocrine system, particularly the hypothalamus, and neurological function.