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.Continue Reading
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
The ventral thecal sac refers to the ventral, or front side of the thecal sac, which is a membrane that surrounds the spinal cord and some cerebrospinal fluid. A diagnosis of spinal injury and disease takes the appearance of the thecal sac into consideration.Full Answer >
A child born with a veil over her face is born with the amniotic sac unbroken during birth with the head still covered in the membrane or "veil." It is more common with natural births. It very rarely happens in the hospital because the water is often broken artificially.Full Answer >
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 >
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 >