S2 Bilateral Cysts: Symptoms, Diagnosis, and Treatment Options - Neurosurgery

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Bilateral S2 cysts


Hello Dr.
Lai: The MRI examination revealed cysts on both sides of S2, and I am experiencing symptoms such as perineal pain, which worsens when sitting (around the labia and urethral opening), lower back pain, pain in the buttocks on both sides of the groin, and discomfort in the sacral area (it is also uncomfortable when lying flat).
I cannot sit or stand for long periods.
The rehabilitation doctor mentioned that my pelvic bones and muscles are inflamed and believes that the cysts may be affecting the perineal nerves.
However, the neurosurgeon I consulted thinks that the cysts are not large enough to compress the nerves and suggested conservative treatment with a nerve block procedure.
If surgery is necessary, it would involve puncturing the cysts and filling them (as I recall, that is the general approach).
Therefore, I would like to ask for your opinion, Dr.
Lai.
Thank you.

Xiao Ru, 30~39 year old female. Ask Date: 2023/10/06

Dr. Lai Zhaokang reply Neurosurgery


Hello:
1.
Cysts of the sacrum, predominantly affect females (85%).
Most cases do not require surgery.
Symptoms include pain in the corresponding lumbar, sacral, gluteal, and perineal regions, weakness, numbness, restlessness, and relief when lying flat or on the side.
There may also be changes in bowel function, such as constipation, bladder function changes including increased frequency or incontinence, and alterations in sexual function.
2.
It is still recommended to prioritize conservative treatment (medication + rehabilitation).
Further options include injection therapy or pain nerve block procedures.
3.
If ineffective, plan for an invasive imaging-guided cyst aspiration procedure with injection of fibrin glue or other substances to prevent the cyst from refilling.
4.
If still ineffective, arrange for microsurgical intervention: cyst fenestration, layering technique, suturing, and the use of fat, tissue adhesive, or muscle flaps to fill the decompressed space and prevent reaccumulation of cerebrospinal fluid (CSF) leading to recurrence.
5.
Surgery carries potential risks such as leakage, infection, bleeding, nerve damage, and recurrence.
If surgery is necessary, it should be performed by a qualified and experienced neurosurgeon.
Wishing you a speedy recovery.

By Dr.
Lai Chao-Kang, Director of the Spine Neurosurgery Department, Changhua Hospital.

Reply Date: 2023/10/06

More Info


Understanding S2 bilateral cysts involves a comprehensive look at the symptoms, diagnosis, and treatment options available for this condition. Based on your description, it seems you are experiencing significant discomfort and pain in the perineal area, lower back, and buttocks, which can be quite distressing.

Symptoms
The symptoms you are experiencing, such as perineal pain that worsens when sitting, lower back pain, and discomfort in the gluteal region, can be indicative of several underlying issues. The presence of bilateral cysts at the S2 level may contribute to these symptoms, especially if they are causing inflammation or irritation of surrounding structures, including nerves. The pain you describe could be related to nerve compression or inflammation, which can occur if the cysts are located near nerve pathways.


Diagnosis
The diagnosis of bilateral cysts at the S2 level is typically made through imaging studies such as MRI, which you have already undergone. MRI is particularly useful in visualizing soft tissue structures and can help determine the size and characteristics of the cysts. In your case, the cysts are described as not being large enough to cause significant nerve compression according to the neurosurgeon. However, the symptoms you are experiencing suggest that there may still be some degree of irritation or inflammation affecting the nerves in that area.


Treatment Options
1. Conservative Management: Given that the cysts are not deemed large enough to warrant immediate surgical intervention, conservative treatment options are often recommended first. This may include physical therapy, pain management strategies, and anti-inflammatory medications. Physical therapy can help strengthen the muscles around the pelvis and lower back, potentially alleviating some of the pain.

2. Interventional Procedures: If conservative management does not provide sufficient relief, interventional procedures such as nerve blocks may be considered. These can help reduce inflammation and pain by targeting the specific nerves that are affected.

3. Surgical Options: If the cysts grow larger or if conservative treatments fail to alleviate your symptoms, surgical options may be explored. The procedure you mentioned, where the cyst is aspirated or drained, followed by filling it with a substance to prevent recurrence, is one potential approach. This is typically done if the cysts are causing significant pain or functional impairment.

4. Monitoring: Regular follow-up with your healthcare provider is essential to monitor the size of the cysts and the progression of your symptoms. If there are any changes, such as increased pain or new symptoms, further evaluation may be necessary.


Conclusion
It is important to work closely with your healthcare team, including your primary care physician, physical therapist, and any specialists involved in your care. They can help tailor a treatment plan that addresses your specific symptoms and needs. If you feel that your symptoms are not improving or are worsening, do not hesitate to seek further evaluation or a second opinion. Your comfort and quality of life are paramount, and there are various options available to help manage your condition effectively.

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