Understanding Rathke Cleft Cyst: Symptoms, Causes, and Care Options
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: September 2026
A Rathke cleft cyst is a noncancerous, fluid-filled growth on the pituitary gland at the base of the brain. It forms during fetal development when a pocket called Rathke’s pouch does not close completely. Most people have no symptoms and find the cyst by chance on imaging, but larger cysts can press on nearby structures and cause headaches, vision changes, and hormone problems. Treatment is usually needed only if symptoms appear, often minimally invasive drainage surgery.
Quick answer: A Rathke cleft cyst is a benign growth on the pituitary gland, the small organ that regulates essential hormones. It is congenital, meaning it is present from birth, and results from incomplete closure of Rathke’s pouch during fetal development. Estimates suggest it affects 1% to 5% of people, although most cases go undiagnosed because there are no symptoms. When a cyst grows large enough to compress nearby structures, headaches, loss of peripheral vision, and fatigue are the most common signs. MRI is the main diagnostic tool, cysts without symptoms are usually monitored, and surgery is reserved for the roughly 10% of patients with significant symptoms.
What Is a Rathke Cleft Cyst?
A Rathke cleft cyst is a fluid-filled sac that develops on the pituitary gland, a small organ at the base of the brain that controls many of the body’s hormones. The cyst is not cancer, does not spread, and does not turn into a malignant tumor.
Because most of these cysts are small and stable, many people live their entire lives without knowing they have one. They are typically discovered by chance when a brain MRI or CT scan is done for another reason, and they are most often found in adults between 30 and 50 years of age.
Symptoms and Clinical Indicators
Many Rathke cleft cysts cause no symptoms at all. Those that grow large enough to compress the pituitary gland or the optic nerves, however, can cause a range of neurological, visual, and hormonal symptoms.
Category | Specific Signs |
Neurological | Frequent headaches, confusion, and personality or behavior changes. |
Vision | Loss of peripheral vision, blurred vision, or other sudden vision changes. |
Hormonal | Fatigue, unexplained weight changes, low sex drive, and irregular menstrual cycles. |
Other | Extreme thirst, excessive urination, dry skin, and difficulty regulating body temperature. |
Causes and Development
Rathke cleft cysts are developmental in nature. They are not caused by lifestyle factors or external triggers. They form in four broad steps.
Fetal development: Early in pregnancy, the pituitary gland forms from a structure known as Rathke’s pouch.
Incomplete closure: In most people this pouch closes fully, but in some a small pocket remains.
Fluid accumulation: Over time, the pocket can fill with mucus-like fluid, forming a cyst.
Growth: Most cysts grow very slowly or not at all, but some expand and press on the optic nerves or the pituitary gland itself.
How a Rathke Cleft Cyst Is Diagnosed
Healthcare providers focus on monitoring the size of the cyst and on checking whether it is affecting hormone levels or vision. Three main tools are used.
MRI (magnetic resonance imaging): The primary tool for visualizing the cyst and its relationship to surrounding structures.
Blood tests: Used to check hormone levels and confirm that the pituitary gland is working correctly.
Vision exams: Comprehensive eye tests to detect any effect on the optic nerves or the visual field.
Treatment Options
For most people, the standard approach is to watch and wait. Treatment becomes necessary when the cyst causes significant symptoms.
Approach | Details |
Observation | Regular MRI scans to monitor the cyst for growth or changes in appearance. |
Surgical drainage | For symptomatic cysts, surgeons often use an endoscopic transsphenoidal approach, through the nose, to drain and remove the cyst. |
Hormone replacement | If the cyst has caused significant hormone deficits, supplemental hormone therapy may be needed. |
Conclusion and Next Steps
A Rathke cleft cyst is usually a harmless, slow-growing finding, and most people never need treatment. When symptoms do appear, effective options are available, and outcomes are generally good with proper monitoring and follow-up.
Talk with your healthcare provider if you have persistent headaches, vision changes, or signs of a hormone imbalance. Seek emergency care right away for sudden, severe vision changes, an intense “thunderclap” headache, or sudden confusion. Organizations such as the Pituitary Network Association and the National Organization for Rare Disorders (NORD) provide patient education and support.
Frequently Asked Questions
Is a Rathke cleft cyst a brain tumor?
It is a benign (noncancerous) growth, not a brain tumor in the traditional sense, and it does not spread to other parts of the body.
Can these cysts become cancerous?
No. Rathke cleft cysts are noncancerous and do not turn into malignant tumors.
How common are they?
Experts estimate that between 1% and 5% of people have these cysts, although most never know it because they have no symptoms.
Why was my cyst found if I didn’t have symptoms?
Many cysts are “incidental findings,” meaning they are discovered during an MRI or CT scan done for an unrelated reason, such as a head injury or sinus problem.
What is the most common symptom?
Headaches and vision changes, specifically loss of peripheral vision, are the most common symptoms reported by people with larger cysts.
Do children get Rathke cleft cysts?
They are rarely diagnosed in children and are most commonly found in adults between the ages of 30 and 50.
Can a cyst cause weight gain?
Yes. If the cyst presses on the pituitary gland, it can disrupt the hormones that regulate metabolism, leading to unexplained weight changes.
What is the surgery like?
The most common operation is minimally invasive and performed through the nose (endoscopic transsphenoidal surgery) to drain the cyst and relieve pressure.
Will the cyst come back after surgery?
Recurrence is possible, which is why follow-up MRI scans are used to check for any regrowth.
Can I live a normal life with a Rathke cleft cyst?
Yes. The vast majority of people with these cysts live normal, healthy lives without ever needing treatment.
Does the cyst affect fertility?
It can if it disrupts the hormones that control the menstrual cycle or reproductive function, but these problems often improve after treatment.
What happens if I don’t treat a symptomatic cyst?
An untreated cyst that is causing pressure can lead to permanent vision loss or chronic hormone deficiencies.
How fast do these cysts grow?
They typically grow very slowly over many years, and some may even shrink on their own.
Are there any restrictions if I have a cyst?
Unless you have symptoms such as vision loss, there are generally no lifestyle or activity restrictions.
When should I seek emergency care?
Seek immediate medical attention for sudden, severe vision changes, an intense “thunderclap” headache, or sudden confusion.
Medical Disclaimer: The information provided in this article is for educational purposes only and is not intended as medical advice. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read here. If you think you may have a medical emergency, call your doctor or 911 immediately.
Comments