Why am I facing hypothalamic obesity after brain surgery?

Question

Hello doctor,

I am a 26-year-old woman struggling with hypothalamic obesity after surgery for a craniopharyngioma two years ago. Despite careful eating and light exercise, I have gained almost 48.5 pounds. My menstrual cycles have become very irregular, sometimes absent for up to two months.

Recent tests show:

High fasting insulin: 32 µIU/mL.
Low LH (luteinizing hormone) and FSH (follicle-stimulating hormone).
Mildly elevated prolactin.
Lipid profile: Triglycerides 248 mg/dL, HDL (high density lipid) 34 mg/dL.

My endocrinologist mentioned that these issues are due to hypothalamic dysfunction, but I am worried about my fertility.

I am also concerned about my metabolic health and would like to know if medications like GLP-1 (glucagon-like peptide-1) agonists or setmelanotide could help with weight control, while still being safe for future pregnancy.

Additionally, I experience fatigue, low libido, and frequent mood changes.

Could these symptoms (fatigue, low libido, mood changes) be due to hypothalamic hormonal imbalance or the weight gain itself?
Is hormone replacement therapy an option for restoring regular cycles and improving fertility?
Can medications like GLP-1 (glucagon-like peptide-1) agonists or setmelanotide safely help with weight control in someone planning pregnancy later?
Given my hormonal and metabolic profile, is conception still possible in the next couple of years?

Please help.

Thank you.

Answer 1

Hello,

Welcome to icliniq.com.

I have read your query and can understand your concern.

I am really sorry you are dealing with this. Hypothalamic obesity after craniopharyngioma surgery can be especially frustrating because weight gain often happens despite careful eating and regular activity. This type of weight gain is largely driven by disruptions in the brain’s regulation of appetite, metabolism, and hormones, rather than lifestyle alone.

The hypothalamus controls signals for hunger, energy use, and reproductive hormones. When it is affected by surgery or tumor pressure, it can lead to both rapid weight gain and irregular or absent menstrual cycles. Your high fasting insulin indicates insulin resistance, which is common in hypothalamic obesity and can worsen fat storage and metabolic imbalance. Low LH (luteinizing hormone) and FSH (follicle-stimulating hormone), along with mildly elevated prolactin suggest impaired signaling between the hypothalamus and pituitary. While this can temporarily suppress ovulation, it does not necessarily mean permanent infertility; with proper hormonal and metabolic management, conception is still possible.

Your lipid levels and insulin resistance show that focusing on metabolic health is important alongside reproductive goals. Medications like GLP-1 (glucagon-like peptide-1) receptor agonists (for example, Liraglutide or Semaglutide) may help reduce appetite and improve insulin sensitivity, but they are not recommended during pregnancy or active conception attempts. Setmelanotide may have potential benefits for hypothalamic obesity, though data in post-craniopharyngioma patients and women planning pregnancy are limited. Your endocrinologist can guide whether these options are suitable for you.

Fatigue, mood changes, and low libido are likely linked to both hypothalamic-pituitary disruption and resulting hormonal imbalances. Low gonadotropins reduce estrogen, which can affect mood, sexual function, and energy. Hormone replacement therapy (HRT) or tailored estrogen-progestin therapy may help regulate cycles, protect bone health, and improve overall well-being. If fertility is a goal, ovulation can sometimes be induced with gonadotropin therapy or other assisted reproductive techniques once metabolic control is optimized.

With careful management of hormones, metabolism, and reproductive planning, many women in similar situations can regain fertility and improve their overall health.

I hope this answers your query.

Please let me know if I can assist you further.

Thank you.