- UTHealth Houston Skull Base Program
- Rathke’s Cleft Cysts
Rathke’s Cleft Cysts
What are Rathke’s cleft cysts?
Rathke’s cleft cysts are benign, fluid-filled cysts that develop in the pituitary gland from remnants of the embryologic Rathke’s pouch. They are typically located between the anterior and posterior portions of the pituitary gland and are often discovered incidentally on imaging. While many Rathke’s cleft cysts remain small and asymptomatic, larger cysts can compress nearby structures, including the pituitary gland and optic nerves, leading to symptoms.
Causes and risk factors
Rathke’s cleft cysts arise from developmental remnants present at birth. They are not caused by lifestyle or environmental factors and are not typically associated with inherited conditions. Most occur sporadically, and there are no well-established risk factors.
What are the symptoms of Rathke’s cleft cysts?
Small cysts often cause no symptoms. When symptoms do occur, they are usually related to pressure on surrounding structures. Common symptoms include headaches, vision changes—especially reduced peripheral vision—and hormonal imbalances due to disruption of normal pituitary function. Some patients may experience fatigue, menstrual irregularities, or decreased libido. In rare cases, cyst rupture or inflammation can cause sudden worsening of symptoms.
Diagnosis
Diagnosis is usually made with an MRI of the brain, which can clearly identify the cyst and distinguish it from other pituitary region masses. Endocrine testing is often performed to evaluate pituitary hormone function. In some cases, visual field testing is recommended to assess any impact on the optic nerves.
What are treatment options for Rathke’s cleft cysts?
Observation with periodic imaging is appropriate for small, asymptomatic cysts. When treatment is needed due to symptoms or cyst growth, the most common approach is minimally invasive endoscopic transsphenoidal surgery to drain and decompress the cyst. Complete removal of the cyst wall is not always necessary and may increase the risk of complications. Hormonal imbalances may require medical management. Outcomes are generally very good, especially when symptoms are addressed early. Many patients experience relief of headaches and visual symptoms after treatment. Some may require ongoing hormone replacement therapy if pituitary function is affected. Recurrence is possible, so long-term follow-up with imaging and clinical evaluation is recommended.