Hypothalamic dysfunctionHypothalamic syndromes
Hypothalamic dysfunction is a problem with part of the brain called the hypothalamus. The hypothalamus helps control the pituitary gland and regulates many body functions.
The hypothalamus helps keep the body's internal functions in balance. It helps regulate:
- Appetite and weight
- Body temperature
- Emotions, behavior, memory
- Production of breast milk
- Salt and water balance
- Sex drive
- Sleep-wake cycle and the body clock
Another important function of the hypothalamus is to control the pituitary gland. The pituitary is a small gland at the base of the brain. It lies just below the hypothalamus. The pituitary, in turn, controls the:
There are many causes of hypothalamic dysfunction. The most are surgery, traumatic brain injury, tumors, and radiation.
Other causes include:
- Nutrition problems, such as eating disorders (anorexia), extreme weight loss
- Blood vessel problems in the brain, such as aneurysm, pituitary apoplexy , subarachnoid hemorrhage
- Genetic disorders, such as Prader-Willi syndrome, familial diabetes insipidus, Kallmann syndrome
- Infections and swelling (inflammation)
Symptoms are usually due to the hormones or brain signals that are missing. In children, there may be growth problems, either too much or too little growth. In other children, puberty occurs too early or too late.
Tumor symptoms may include headache or loss of vision.
Low adrenal function symptoms may include fatigue, weakness, poor appetite, weight loss, and lack of interest in activities.
Exams and Tests
The health care provider will perform a physical examination and ask about your symptoms.
Blood or urine tests may be ordered to determine levels of hormones such as:
- Growth hormone
- Pituitary hormones
- Blood and urine osmolality
Other possible tests include:
- Hormone injections followed by timed blood samples
- MRI or CT scans of the brain
- Visual field eye exam (if there is a tumor)
Treatment depends on the cause of the hypothalamic dysfunction:
- For tumors, surgery or radiation may be needed.
- For hormonal deficiencies, missing hormones need to be replaced by taking medicine.
Many causes of hypothalamic dysfunction are treatable. Most of the time, missing hormones can be replaced.
Complications of hypothalamic dysfunction depend on the cause.
- Permanent blindness
- Problems related to the brain area where the tumor occurs
- Vision disorders
- Problems controlling salt and water balance
- Heart problems
- High cholesterol
- Inability to deal with stress (such as surgery or infection), which can be life threatening by causing low blood pressure
SEX GLAND DEFICIENCY
GROWTH HORMONE DEFICIENCY
- High cholesterol
- Short stature (in children)
When to Contact a Medical Professional
Call your provider if you have:
- Symptoms of hormone excess or deficiency
- Vision problems
If you have symptoms of a hormonal deficiency, discuss replacement therapy with your provider.
Giustina A, Braunstein GD. Hypothalamic syndromes. In: Jameson JL, De Groot LJ, de Kretser DM, et al, eds. Endocrinology: Adult and Pediatric. 7th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 10.
Molitch ME. Neuroendocrinology and the neuroendocrine system. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 223.
Review Date: 5/7/2017
Reviewed By: Brent Wisse, MD, Associate Professor of Medicine, Division of Metabolism, Endocrinology & Nutrition, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.