What Is Thecal Sac?

Are you curious to know what is thecal sac? You have come to the right place as I am going to tell you everything about thecal sac in a very simple explanation. Without further discussion let’s begin to know what is thecal sac?

What Is Thecal Sac?

The thecal sac is an important part of the spinal cord and the central nervous system. It is a membrane that surrounds the spinal cord and contains cerebrospinal fluid, which provides cushioning and support for the spinal cord. In this blog, we’ll explore the anatomy and function of the thecal sac, as well as the conditions that can affect it.

The spinal cord is a long, tubular structure that runs from the base of the brain to the lower back. It is surrounded and protected by three layers of tissue called the meninges. The thecal sac is the outermost layer of the meninges and contains the cerebrospinal fluid, which acts as a cushion to protect the spinal cord from damage.

The thecal sac is made up of tough, fibrous tissue and is continuous with the dura mater, which is the outermost layer of the brain’s meninges. It is responsible for protecting the spinal cord from injury and infection, as well as for providing cushioning and support for the spinal cord.

The thecal sac can be affected by a number of conditions, including spinal stenosis, which is a narrowing of the spinal canal that can put pressure on the spinal cord and the nerve roots that exit the spinal cord. This can cause pain, numbness, weakness, and other symptoms. Another condition that can affect the thecal sac is a herniated disc, which is a bulging or ruptured disc in the spine that can also put pressure on the spinal cord or nerve roots.

In some cases, a condition called a thecal sac tumor can also affect the thecal sac. This is a rare type of tumor that grows inside the thecal sac and can put pressure on the spinal cord or nerve roots. Symptoms of a thecal sac tumor can include pain, weakness, numbness, and difficulty walking.

In conclusion, the thecal sac is an important part of the spinal cord and the central nervous system. It surrounds the spinal cord and contains cerebrospinal fluid, which provides cushioning and support for the spinal cord. Conditions that can affect the thecal sac include spinal stenosis, herniated discs, and thecal sac tumors. If you experience any symptoms related to the thecal sac or the spinal cord, it’s important to seek medical attention promptly to determine the cause and receive appropriate treatment.

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FAQ

What Happens If The Thecal Sac Is Compressed?

If there is central stenosis and marked compression of the entire dural/thecal sac, the patient may demonstrate paralysis (e.g., cauda equina syndrome) with sphincter loss (bladder and rectal dysfunction).

Does Thecal Sac Compression Cause Pain?

Metastatic spinal cord compression (MSCC) is one of the ominous causes of back pain where there is a compression of the thecal sac and its components by tumor mass.

Does Thecal Sac Compression Require Surgery?

Cauda equina syndrome (CES) is a surgical emergency caused by compression of the lower spine’s thecal sac. The condition may lead to weakness and numbness of the legs, bowel bladder dysfunction, and saddle area numbness.

What Nerves Are In The Thecal Sac?

Neural Anatomy. The thecal sac ends blindly at the S2 level. The lower sacral and coccygeal nerves emerge from the sac, as does the extradural portion of the filum terminale.

What Are The Symptoms Of Thecal Compression?

These are common symptoms: Pain and stiffness in the neck, back, or lower back. Burning pain that spreads to the arms, buttocks, or down into the legs (sciatica) Numbness, cramping, or weakness in the arms, hands, or legs.

 

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