I am 19, female. Does brain surgery cause weight gain?

Question

Hello doctor,

I am a 19-year-old girl who has gained over 80 pounds in the past year after undergoing brain surgery to remove a tumor near my pituitary gland, and no matter what I do, I cannot stop gaining weight. I am constantly hungry and craving food, even right after eating large meals. I have also stopped having periods and developed dark patches of skin on my neck and underarms. I feel depressed and tired all the time, and kids at school are bullying me because of how quickly I gained weight.

My doctors have told me that this weight gain might be permanent because of possible brain damage from the surgery, and I am terrified that I will keep gaining weight indefinitely and develop diabetes or heart problems like my obese aunt did. Could the brain surgery have permanently damaged my ability to control my weight? Am I going to become severely obese with diabetes and other serious health problems for the rest of my life?

Kindly advise.

Answer 1

Hello,

Welcome to icliniq.com.

I understand your concern.

The condition you are describing sounds very much like hypothalamic obesity, which can occur after surgery for tumors near the pituitary gland and hypothalamus. The hypothalamus is the part of the brain that helps regulate appetite, energy balance, metabolism, and hormones.

When it is damaged by a tumor or surgery, the normal signals that tell your brain you are full may no longer work. This explains why you feel constant hunger and continue gaining weight even when you are eating carefully.

The absence of periods and the dark patches of skin on your neck and underarms (called acanthosis nigricans) suggest that your hormones and insulin are also being affected, which can increase the risk of diabetes if not properly managed. The weight gain you are experiencing is not your fault and is very different from ordinary obesity. It is caused by changes in brain regulation rather than a lack of willpower.

While hypothalamic obesity is a serious condition and can be difficult to control, it does not mean you are destined to keep gaining weight endlessly or to develop severe complications.

Treatments are available, including specialized medicines that can help reduce appetite, such as Setmelanotide or Octreotide, and medicines that improve insulin sensitivity, such as Metformin. Careful hormonal replacement therapy may also be required if your pituitary gland function has been affected. In some cases, bariatric surgery is considered when weight gain is severe and not controlled by medicines.

Managing this condition usually requires a team approach involving endocrinologists, nutrition specialists, and sometimes mental health professionals to support the emotional challenges that come with it. With the right care, the risk of developing diabetes and heart problems can be significantly reduced, and your quality of life can improve.

The most important step now is to work closely with your endocrinologist, who can check for hormone imbalances, adjust your treatment, and discuss newer therapeutic options specifically designed for hypothalamic obesity.

I hope you are satisfied with my answer. For further queries, you can consult me at iCliniq.

Thank you.