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Hypothalamic Obesity

A rare form of obesity caused by damage to the brain's hypothalamus, leading to uncontrollable hunger and reduced metabolism that resists standard weight loss approaches.

Hypothalamic obesity is a rare type of weight gain caused by damage to the hypothalamus, a small area in the brain that controls hunger and metabolism. This can happen after brain surgery, radiation treatment, or a tumour affecting the hypothalamus. Unlike typical obesity, it is driven by an abnormal brain signal that makes you feel constantly hungry, and it often does not respond to standard diet and exercise alone.

Hypothalamic obesity results from structural or functional disruption of the ventromedial and arcuate nuclei of the hypothalamus, which govern energy homeostasis via leptin, insulin, and melanocortin signalling. Damage leads to hyperphagia, autonomic dysregulation (reduced sympathetic tone and basal metabolic rate), and hyperinsulinemia driven by vagal nerve overactivation. It is most commonly seen following craniopharyngioma resection, where up to 50% of survivors develop severe obesity. Management typically requires pharmacological intervention targeting the central melanocortin pathway or insulin suppression.

Hypothalamic obesity requires a fundamentally different treatment approach than common obesity. At NuLifeCare Singapore, Dr. Joseph Wang can help identify whether an underlying neurological cause may be driving your weight gain and guide you toward appropriate specialist care.

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Medical Disclaimer

This library is for general education and does not replace individual assessment by a qualified healthcare professional. Always consult a doctor for medical advice, diagnosis, or treatment.

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