Q:

What does it mean to have compression or effacement of the thecal sac?

A:

Quick Answer

Compression of the thecal sac means the protective membrane covering the spinal cord is experiencing extra pressure, according to Merck Manuals. Effacement of the thecal sac means that the thecal sac is being shortened or narrowed, according to the Free Dictionary.

 Know More

Full Answer

Effacement of the thecal sac and compression of the thecal sac are diagnoses frequently found on MRI imaging reports for patients complaining of back pain, according to ChiroGeek. MRI scans are typically performed to aid physicians in diagnosing the sources of lumbar or radicular pain in the lower back.

The thecal sac could be compressed by bone, the accumulation of blood, abscesses, tumors or a ruptured or herniated vertebral disk, according to Merck Manuals. Thecal sac compression also could result from the hardening of certain connective tissues as one ages. Compressive forces from hypertrophy of ligamentum flavum also could be impacting the thecal sac, according to ChiroGeek.

Though severe thecal sac compression may limit proper circulation of cerebral spinal fluid, most cases of impingement on the sac generally resolve without treatment, according to The Back Pain Authority. Disc herniations of the central vertebrae are most likely to impinge upon the thecal sac. Thecal sac compression usually produces no noticeable symptoms.

Learn more about Pain & Symptoms

Related Questions

  • Q:

    What causes a bump inside of the nose?

    A:

    Nasal vestibulitis and a nasal furuncle can cause a bump inside the nose, according to Merck Manuals. Paranasal sinus and nasal cavity cancer is another possible cause of a bump inside the nose, states the National Cancer Institute.

    Full Answer >
    Filed Under:
  • Q:

    What are symptoms of gram positive cocci?

    A:

    Gram positive cocci, also known as streptococci, are known to cause numerous disorders, such as pharyngitis, skin infections, endocarditis and sepsis, and the symptoms will vary greatly depending on which vital organs are being affected, as reported by Merck Manuals. Fortunately, although streptococci have been known to affect a large number of different viral organs, most strains are sensitive to penicillin and can be killed off through its administration; however, macrolide-resistant strains have begun to emerge, and are a huge problem within the medical industry. Streptococci can be further classified into three distinct categories, which include alpha-hemolytic streptococci, beta-hemolytic streptococci and gamma-hemolytic streptococci.

    Full Answer >
    Filed Under:
  • Q:

    What does it mean when you have white matter in the corners of your eyes?

    A:

    According to Troy Bedinghaus of About.com, white eye discharge can be a sign of dacryocystitis, which is an infection of the nasolacrimal sac or tear drainage system. Additional symptoms can manifest as facial pain, redness and swelling around the nasal part of the eyelid. If the white eye mucus is stringy in texture, it may signal the presence of allergic conjunctivitis. Symptoms include redness, swelling, itching and increased tear secretion.

    Full Answer >
    Filed Under:
  • Q:

    What are the causes of a tingling sensation in the head?

    A:

    The causes behind a tingling sensation in the head can be attributed to diabetes, peripheral artery disease, peripheral neuropathy, peripheral nerve trauma, peripheral nerve compression, a cold, compartment syndrome, a cerebrovascular accident, a head injury or a facial injury according to Right Diagnosis from HealthGrades. The tingling sensation in the head has been described as partial numbness, and the sensation of having "pins and needles" on the head. This type of condition is also better known as "paresthesia."

    Full Answer >
    Filed Under:

Explore