Tarlov cyst

A detailed overview of Tarlov cysts

Overview

A Tarlov cyst, also known as a perineural cyst, is a type of spinal cyst that occurs at the root of the spinal nerve. These cysts are filled with cerebrospinal fluid and are most commonly found in the sacral region of the spine. Tarlov cysts can be asymptomatic or cause a variety of symptoms depending on their size and location.

Pathophysiology

Tarlov cysts form when there is a dilation of the nerve root sheath, which leads to the accumulation of cerebrospinal fluid. This can cause the cyst to expand and potentially compress nearby nerve roots or other structures. The exact cause of Tarlov cysts is not well understood, but they may be related to trauma, inflammation, or congenital factors.

Symptoms

While many Tarlov cysts are asymptomatic, some individuals may experience symptoms such as:

• Lower back pain
• Sciatica
• Paresthesia or numbness in the legs
• Bladder dysfunction
• Sexual dysfunction

The symptoms are often related to the compression of nerve roots or other structures by the cyst.

Diagnosis

Tarlov cysts are typically diagnosed using magnetic resonance imaging (MRI), which can provide detailed images of the spine and reveal the presence of cysts. Computed tomography (CT) scans and myelography may also be used in certain cases to assess the cysts and their effects on surrounding tissues.

Treatment

The treatment of Tarlov cysts depends on the severity of symptoms. Options include:

• Conservative management: This may involve pain management with medications, physical therapy, and lifestyle modifications.
• Surgical intervention: In cases where symptoms are severe or progressive, surgical options such as cyst fenestration, microsurgical removal, or nerve root decompression may be considered.

Prognosis

The prognosis for individuals with Tarlov cysts varies. Many people with asymptomatic cysts may never require treatment, while those with symptomatic cysts may experience relief with appropriate management. Surgical outcomes can vary, and there is a risk of recurrence or complications.

Related pages

• Spinal cord
• Cerebrospinal fluid
• Nerve root
• Sacrum

Images

File:Spinal cord diagram.png

Diagram of the spinal cord, showing the location of Tarlov cysts in the sacral region.

File:MRI spine.png

MRI image of the spine, highlighting a Tarlov cyst.