Perineural cysts

Perineural cysts are sacs filled with fluid on the nerve root sheath, usually in the sacral region of the spine.

An individual with the cyst is not usually aware since it does not trigger any symptoms. Once symptoms do arise, it includes low back pain as well as discomfort in the legs or buttocks. This can occur in rare instances once the cysts grow large enough with spinal fluid and crushes the adjacent nerves.

What are the signs?

An individual with perineural cysts do not usually have any signs. The symptoms only arise if the cysts are filled with spinal fluid and becomes enlarged in size where the nerves are crushed.

Perineural cysts

Once symptoms do arise, it includes low back pain as well as discomfort in the legs or buttocks.

Pain is the common sign linked with perineural cysts. Once the sciatic nerve is crushed, it results to sciatica which is defined as pain in the lower back and buttocks that often radiates down the rear part of the legs. The discomfort can be sharp and abrupt or mild. In addition, it might be accompanied by numbness and muscular weakness in the legs and feet.

What are the causes?

In most cases, the cause is unknown. If an individual is subjected to some form of trauma in the back, the perineural cysts might be filled with fluid and trigger symptoms. Some of the types of trauma include:

  • Injuries
  • Falls
  • Strenuous activities

Management of perineural cysts

In most instances, treatment is not necessary. In case symptoms are present, treatment is aimed on reducing the discomfort and pressure.

Drainage is an option which relieves the symptoms right away, but this is not a long-term treatment since the cysts might fill up again.

A permanent treatment option is to have the cysts surgically removed. Surgery is recommended if there is serious, chronic pain or there are bladder issues from the cysts.

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