Membrane synovial cyst. Medical search. Frequent questions

This type of cyst is sometimes referred to as a primary or idiopathic Baker's cyst and usually develops in younger people and in children. (patient.info)
On the other hand, several operation methods may be utilized in one type of cyst according to the difference of location or style. (biomedcentral.com)
This type of cyst is not harmful and accounts for about half of all soft tissue tumors of the hand [2]. (ac.ir)
These cysts, called "Dorsal Wrist Ganglions," are the most common type of cyst. (orionactivept.com)
Another common type of cyst is the epidermoid cyst. (web.app)

The joint capsule bulges out into the back of the knee, forming the Baker's cyst that is filled with synovial fluid. (patient.info)
The joint itself is housed within a capsule and the joint cavity within is filled with synovial fluid generated by a layer of synovial membrane lining the cavity. (laparoscopic.md)
The entire knee joint is enclosed within a capsule which is lined with a membrane and filled with synovial fluid that lubricates the joint. (innerwestmassage.com.au)
The cyst is a round sac-like structure filled with Synovial Fluid. (orionactivept.com)

A Baker's cyst is a swelling that can develop behind the knee. (patient.info)
Sometimes, a Baker's cyst can split open (rupture) and cause symptoms in the calf that can be similar to a deep vein thrombosis (DVT). (patient.info)
A Baker's cyst often gets better and disappears by itself over time. (patient.info)
What is a Baker's cyst? (patient.info)
Rarely, a Baker's cyst can develop behind both knees at the same time. (patient.info)
There are two ways in which a Baker's cyst may form. (patient.info)
A Baker's cyst may develop just behind an otherwise healthy knee joint. (patient.info)
It is thought that, in this type of Baker's cyst, there is a connection between the knee joint and the popliteal bursa behind the knee. (patient.info)
This means that synovial fluid from inside the joint can pass into the popliteal bursa and a Baker's cyst can form. (patient.info)
It is more common for a Baker's cyst to develop if there is an underlying problem within the knee, such as arthritis or a tear in the meniscal cartilage that lines the inside of the knee joint. (patient.info)
T This is sometimes referred to as a secondary Baker's cyst. (patient.info)
In a secondary Baker's cyst, the underlying problem within the knee joint causes too much synovial fluid to be produced within the joint. (patient.info)
How common is a Baker's cyst? (patient.info)
Baker's cysts are most common between the ages of 35 and 70, particularly if there is an underlying knee condition. (patient.info)
As above, primary Baker's cysts can occur in children, typically between the ages of 4 and 7. (patient.info)
Baker's cysts may also develop if you have had a tear to the meniscus or to one of the ligaments within the knee , or if you have had an infection within your knee joint. (patient.info)
Baker's cysts (also known as Baker cysts or popliteal cysts) are very common in people with rheumatoid arthritis (RA). (myrateam.com)
There are several ways to manage Baker's cysts, both at home and with medical treatment. (myrateam.com)
What Are Baker's Cysts? (myrateam.com)
A Baker's cyst forms when the envelope surrounding the joint ( joint capsule ) tightens, leading it to produce too much synovial fluid. (myrateam.com)
This fluid can accumulate in the back of your knee (called the popliteal bursa ) and cause a Baker's cyst to develop. (myrateam.com)
Named after 19th century surgeon William Morrant Baker - credited with first describing the condition - Baker's cysts can also occur as the result of injury or other disease, including osteoarthritis. (myrateam.com)
In many cases, Baker's cysts do not cause any symptoms . (myrateam.com)
Note that some of the symptoms of a Baker's cyst - such as swelling, warmth, and redness - may resemble the symptoms of RA . (myrateam.com)
Many myRAteam members have described what Baker's cysts feel like. (myrateam.com)
One member shared how their Baker's cysts were "hurting really badly all day and hard as a rock and very big. (myrateam.com)
Some members find that the pain from Baker's cysts can come and go, while others experience no pain at all. (myrateam.com)
On rare occasions, Baker's cysts may cause complications . (myrateam.com)
In some cases, a Baker's cyst may rupture (burst) and leak synovial fluid into the calf area, which can cause redness, warmth, and pain or the sensation that water is running down your calf . (myrateam.com)
Symptoms of a ruptured Baker's cyst may resemble those of a blood clot in a vein in the leg (deep vein thrombosis). (myrateam.com)
How Are Baker's Cysts Diagnosed? (myrateam.com)
If your rheumatologist suspects you may have a Baker's cyst, they will likely start by asking about your symptoms . (myrateam.com)
Although common in RA, Baker's cysts may elude clinical detection . (myrateam.com)
A Baker's cyst is an uncomfortable condition that most often occurs in adults over 55 or in children between around 4 and 7 years of age. (innerwestmassage.com.au)
It is estimated that around 20% of people with other knee problems may end up suffering from a Baker's cyst. (innerwestmassage.com.au)
Generally symptoms of a Baker's cyst are relatively slight unless the cyst becomes so large as to extend into the calf muscles or if it bursts. (innerwestmassage.com.au)
Massage therapy can assist those suffering from a Baker's cyst by relieving the swelling and discomfort associated with the cyst. (innerwestmassage.com.au)
A Baker's cyst is a swelling at the back of the knee. (innerwestmassage.com.au)
When these people suffer a knee injury, then the body's response is to secrete more synovial fluid into the knee which tends to accumulate and fill this pouch causing the Baker's cyst. (innerwestmassage.com.au)
This is known as a Baker's Cyst. (alignedmodernhealth.com)
If the pain occurs in the back of the knee when bending, it's most likely caused by conditions like Baker's cyst, hamstring tendonitis, or a knee injury. (druggenius.com)

This review will highlight the involvement early in the disease process of not only the cartilage but also the synovial membrane and subchondral bone and the pathophysiological mechanisms of each of these tissues that lead to joint degeneration. (jointdrs.org)
Synovial fluid delivers essential nutrients to the joint and avascular articular cartilage, and also functions as a shock absorber. (laparoscopic.md)
The synovial membrane and capsule thicken, reducing space inside the joint, and in the early stages of the condition pathologic changes in the synovial fluid can cause the cartilage to swell. (laparoscopic.md)
When a joint is not in use, this synovial fluid is partially absorbed by the surrounding cartilage. (myrateam.com)
When a joint is in motion, the synovial fluid is squeezed out of the cartilage, aiding in movement. (myrateam.com)
Rheumatoid arthritis may generally (and incompletely) be described as an immune attack originating in the synovial cells against adjacent cartilage, tendon, bone, and soft tissues. (orthopaedia.com)
The cartilage has no nerve or blood supply and so depends on the joint or synovial fluid for nutrition. (hygain.com.au)
When the pressure stops, the cartilage expands allowing synovial fluid back in. (hygain.com.au)
Proteoglycans are more concentrated in areas where the pressures are greater to allow more synovial fluid to infiltrate the cartilage. (hygain.com.au)
Knee arthroscopy is a minimally-invasive surgical procedure performed on patients suffering from various knee conditions like torn meniscus, torn anterior cruciate ligament, inflamed synovial tissue, damaged articular cartilage, loose fragments of bone or cartilage, patella (kneecap) problems, knee sepsis (infection), etc. (drchrisevensen.com)
A thick, stringy, egg-like fluid, called synovial fluid - found inside the knee capsule - lubricates your knee joint and, along with the meniscus and articular cartilage help reduce friction. (aidmymeniscus.com)
[ 1 ] It can be thought of as a degenerative disorder arising from the biochemical breakdown of articular (hyaline) cartilage in the synovial joints. (medscape.com)
The joints in our body are covered with a thin membrane texture that surrounds the surface of cartilage tissue. (bamklinik.com)
Synovial fluid is a lubricating fluid that supplies nutrients and oxygen to cartilage. (adam.com)
The byproducts of inflammation can rapidly destroy the synovial membrane and collagen matrix, thus inhibiting cartilage synthesis. (bvsalud.org)

Cysts that were compressing one or more nerves and causing bone erosions have been reported to occur near the shoulder joint. (wikipedia.org)

A microarray was created from paraffin-embedded human synovium, including 19 normal/ noninflammatory (10 weight-bearing joints, 8 non-weight-bearing joints), 9 rheumatoid arthritis, 10 synovial cysts, and 3 osteoarthritis and stained with PP (D2-40) and CLU. (johnshopkins.edu)
The classic radiographic hallmarks of osteoarthritis (subchondral sclerosis, joint space narrowing, synovial cysts, and osteophytes) are usually apparent in arthritis of the hand, however, the extent of these radiographic signs does not always correlate well with patients' symptoms. (orthopaedia.com)
Additionally, mucous (mucinous) cysts, similar to ganglion cysts, may form in severe osteoarthritis, occasionally rupturing at the skin surface. (orthopaedia.com)
Other synovial fluid findings that aid in the differentiation of osteoarthritis from other conditions are negative Gram stains and cultures, as well as the absence of crystals when fluid is viewed under a polarized microscope. (medscape.com)

This description is based on the observations that the cysts occur close to tendons and joints. (wikipedia.org)
As in other diarthrodial joints, synovial membranes line the surfaces and synovial fluid fills the space enclosed by the fibrous joint capsule. (ajnr.org)
Like most joints in the body, the knee joint is a synovial joint , meaning it contains synovial fluid - a slick liquid that helps cushion and lubricate the joint . (myrateam.com)
Another wrote that theirs are "very painful and put added pressure on the joints," while a third said that their cyst interferes with their sleep: "It's so painful at night. (myrateam.com)
The Synovial Fluid acts as a cushion and lubricant between the joints, allowing us to perform smooth and painless motions. (orionactivept.com)
One theory suggests that trauma or stress at the wrist joints may cause degeneration and the formation of cysts. (orionactivept.com)
The cyst may develop when Synovial Fluid collects between the joints. (orionactivept.com)
Synovial hyperplasia often presents when joints become inflamed due to immune cell infiltration. (bvsalud.org)
AS causes inflammation of the tissue lining the inside of the joints, called the synovial membrane. (medicalnewstoday.com)
Synovial sarcoma is a malignant soft-tissue neoplasm that most commonly affects the extremities near to, but not in continuity with, large joints. (medscape.com)
Components of the immune system attack the soft tissue that lines the joints (synovial tissue) and can also attack connective tissue in many other parts of the body, such as the blood vessels and lungs. (msdmanuals.com)

Rarely, intraosseous ganglion cysts occur, sometimes in combination with a cyst in the overlying soft tissue. (wikipedia.org)
The microscopic anatomy of the cyst resembles that of tenosynovial tissue. (wikipedia.org)
[ 5 ] The latter theory postulated that local tissue trauma or irritation causes production of hyaluronic acid at the synovial-capsular interface. (medscape.com)
This membrane of granulated tissue forms most often as a result of rheumatoid arthritis, in which the condition is called a rheumatoid pannus . (upmc.com)
This tissue will spread from the synovial membrane, causing considerable destruction as it invades the subchondral bone. (upmc.com)
A Ganglion cyst is a small sac of fluid that forms over a joint or tendon (tissue that connects muscle to bone). (ac.ir)
Multiple small cysts can give the appearance of more than one cyst, but a common stalk usually connects them within the deeper tissue. (ac.ir)
One theory suggests that trauma causes the tissue of the joint to break down, forming small cysts that join into a larger, more obvious mass. (ac.ir)
This tissue is called synovial tissue. (bamklinik.com)
This membrane tissue is rich in vascular tissue, the task is to produce liquids and substances necessary for the joint, as well as to remove foreign substances in the joint. (bamklinik.com)
The physician had to cut into the subcutaneous tissue to Aug 3, 2017 What is the appropriate CPT code for the removal of a sebaceous cyst on the left lower lid with suture closure? (web.app)
Synovial membrane - Another tissue that lines the joint. (druggenius.com)
Histopathological examination of the cyst revealed thick fibrous connective tissue interspersed with areas of chronic inflammation. (bvsalud.org)

Common wrist ganglions include: dorsal wrist ganglion volar wrist ganglion volar retinaculum ganglion extensor retinaculum ganglion occult ganglion intraosseous ganglion mucous cyst In a 2007 study of patients in Glasgow whose foot lumps were removed surgically, 39 of 101 cases were ganglion cysts. (wikipedia.org)
Mucous cysts and some other ganglions are associated with degenerative joint disease. (medscape.com)
Mucous cysts are ganglions of the distal interphalangeal (DIP) joint that occur primarily in persons aged 40-70 years. (medscape.com)
Other sites, although less common, include the base of the fingers on the palm, where they appear as small pea-sized bumps, the fingertip, just below the cuticle, where they are called mucous cysts, the outside of the knee and ankle, and the top of the foot [4]. (ac.ir)

Epidermoid Cyst. (web.app)

The Synovial Membrane secretes a thick liquid called Synovial Fluid. (orionactivept.com)
This ligamentous capsule is also lined with a synovial membrane that secretes synovial fluid for lubrication. (drchrisevensen.com)
It secretes a clear, sticky fluid called the synovial fluid, which surrounds the joint to provide lubrication. (druggenius.com)

Notably, conventional systems of classification fail to consider intraspinal epidural spinal arachnoid cysts as a distinct type given it only uses anatomical location for diagnosis. (biomedcentral.com)
In this article we report the case of a radiocapitellar joint ganglion cyst without any neurological involvement in the elbow, in a middle-aged female where the diagnosis could not be made for more than a year. (ac.ir)
Sometimes doctors use Needle Aspiration to confirm the diagnosis of a Ganglion Cyst. (orionactivept.com)
CONCLUSIONS: The described labelling method is an important step towards developing a machine learning algorithm that will enable automated diagnosis of osteochondrosis manifesta and cyst-like lesions. (bvsalud.org)
But unusual locations with atypical presentations may pose problem in diagnosis as well Sebaceous cyst. (web.app)
L72.3 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis Epidermoid Cysts (Sebaceous Cysts). (web.app)

2021. https://www.tabers.com/tabersonline/view/Tabers-Dictionary/750966/all/synovial_fold. (tabers.com)
Det bildas inuti körtlarna som 3 jan. 2021 - Sebaceous cystor kan växa till mer än en tum i diameter. (web.app)

Medial Plica Syndrome: Inflammation of the synovial membrane in the knee joint. (darev.eu)
When this inflammation occurs, the synovial membrane of the bursa becomes thicker and produces more fluid than normal, causing swelling. (alignedmodernhealth.com)

Rheumatoid arthritis begins in the synovial membrane with activation of the innate immune system, leading to loading of antigen presenting cells (APCs) with auto-antigens. (orthopaedia.com)

discal cysts are rare pathology. (bvsalud.org)
Discal cysts are rare intraspinal lesions. (bvsalud.org)

A similar but rarely diagnosed condition is an odontoid synovial cyst , which has similar symptoms and treatment. (upmc.com)
Most ganglion cysts cause some degree of pain, usually following acute or repetitive trauma, but up to 35% are without symptoms except for appearance. (ac.ir)
Your doctor can diagnose a Ganglion Cyst by performing an examination and talking to you about your symptoms. (orionactivept.com)
They can trigger severe neurological symptoms, and should be differentiated from other forms of epidural cysts and tumors. (bvsalud.org)

A ganglion cyst is a fluid-filled bump associated with a joint or tendon sheath. (wikipedia.org)
Between 50 and 70% of all masses on the hand and wrist are ganglion cysts. (wikipedia.org)
Ganglion cysts most frequently occur around the dorsum of the wrist and on the fingers. (wikipedia.org)
Although most commonly found in the wrist, ganglion cysts also may occur in the foot. (wikipedia.org)
The study replicated earlier findings that no ganglion cysts were found on the sole or heel. (wikipedia.org)
The researchers noted a preponderance of occurrence among females (85%) and that 11 of the other cases had been misdiagnosed as ganglion cysts before surgery. (wikipedia.org)
Ganglion cysts are not limited to the hands and feet. (wikipedia.org)
From their common origin at a joint or tendon, ganglion cysts may form in a wide range of locations. (wikipedia.org)
Rare cases of intramuscular ganglion cysts in the gastrocnemius muscle of the calf have been reported. (wikipedia.org)
Cystic adventitial disease, in which a cyst occurs within the popliteal artery near the knee, has been proposed recently to occur by an articular mechanism, with a conduit leading from the joint, similar to the development of ganglion cysts, that spreads within the peroneal nerve. (wikipedia.org)
Other possible mechanisms for the development of ganglion cysts include repeated mechanical stress, facet arthrosis, myxoid degeneration of periarticular fibrous tissues and liquefaction with chronic damage, increased production of hyaluronic acid by fibroblasts, and a proliferation of mesenchymal cells. (wikipedia.org)
For patient education resources, see Ganglion Cyst and Carpal Tunnel Syndrome . (medscape.com)
Ganglion cysts, also known as Bible cysts, are more common in women, and 70% occur in people aged 20-40 years. (ac.ir)
Rarely, ganglion cysts can occur in children younger than 10 years [3]. (ac.ir)
Ganglion cysts most commonly occur on the back of the hand at the wrist joint but they can also develop on the palm side of the wrist. (ac.ir)
The cause of ganglion cysts is unknown. (ac.ir)
The ganglion cyst usually appears as a mass that progressively enlarges. (ac.ir)
The cyst was identified as a ganglion clinically and excised completely (Figure 4). (ac.ir)
A ganglion is a cyst filled with colloid material developed within the vicinity of a joint or tendon sheath. (ac.ir)
Ganglion Cysts are a common condition. (orionactivept.com)
Ganglion Cysts usually appear as bumps on the back of the hand and at either side of the wrist. (orionactivept.com)
Instead, individuals with Ganglion Cysts have several professional treatment options to choose from. (orionactivept.com)
Ganglion Cysts arise from the fluid filled areas on the ligaments or between the bones. (orionactivept.com)
Ganglion Cysts occasionally develop on the palm side of the wrist near the thumb and on the fingertips, just below the cuticle. (orionactivept.com)
Ganglion Cysts can appear on the lower extremities as well. (orionactivept.com)
Overall, Ganglion Cysts occur more often in women. (orionactivept.com)
According to this theory, prior wrist injuries that are re-injured may be susceptible to Ganglion Cyst development. (orionactivept.com)
The second, most likely theory is that the Ganglion Cysts form because of structural flaws in the joint tissues. (orionactivept.com)
Ganglion Cysts can be so small that they are not noticeable underneath the skin. (orionactivept.com)
You should have your physician evaluate a suspected Ganglion Cyst, but it is not a medical emergency. (orionactivept.com)

It is lined by a special membrane called the synovium. (patient.info)
The synovium produces a fluid called synovial fluid. (patient.info)
Synovium The synovium is a thin membrane lining in the inside of the capsule around a joint. (adam.com)

The cardinal radiographic features of OA are focal/non-uniform narrowing of the joint space in the areas subjected to the most pressure, subchondral cysts, subchondral sclerosis, and osteophytes. (sttinfo.fi)

Various types of cystic lesions are confronted in the spinal canal and are classified based on their relationship to the adjacent structures and nature of the cyst content. (biomedcentral.com)
We reviewed and summarized classification, mechanisms and treatments of these true spinal canal cysts respectively, except for the cyst-like lesions. (biomedcentral.com)
Among the cysts in the spinal canal, the arachnoid derived lesions are most common. (biomedcentral.com)
RESULTS: Six thousand two hundred fifty osteochondrosis manifesta and cyst-like lesions were labelled in 201 pigs representing a total volume of 211,721.83 mm3. (bvsalud.org)
Synovial membrane is an important as well as a highly specific component of the joint, and its lesions can lead to degeneration of the joint surface, causing pain and joint disability or affecting the patients' quality of life in severe cases. (bvsalud.org)
Unlike comedones, papules and pustules which are superficial acne lesions, nodules and cysts can cause permanent damage to the skin. (progressivehealth.com)

This causes trauma to the bone, puts strain on the ligaments and can lead to the formation of osteosteoarthritisrthritic cysts. (laparoscopic.md)
The ligaments are lined with a Synovial Membrane. (orionactivept.com)

As a result, it causes destructive osteoarthropathies, such as carpal tunnel syndrome , flexor tenosynovitis , subchondral bone cysts, and erosions, as well as pathologic fractures. (medscape.com)

In hand, when the cyst is connected to a tendon, it may cause a sense of weakness in the affected finger [6]. (ac.ir)

A Synovial plica is a fold of the synovial membrane in the knee joint. (sportsinjuryclinic.net)

Dye injected into the cyst rarely enters the joint, however, which has been attributed to the apparent formation of an effective and one-way "check valve", allowing fluid out of the joint, but not back in. (wikipedia.org)

Cyst definition is - a closed sac having a distinct membrane and developing abnormally in a cavity or structure of the body. (web.app)

This lesion had many milia-like cysts, a feature commonly seen in SK. (web.app)

The cyst and radial nerve were explored through an anterolateral curved incision, with ligation of the radial recurrent vessels. (ac.ir)
The cyst was on the capsule of the radiocapitellar joint and posterior to the interosseous nerve at the proximal fibers edge of the supinator muscle. (ac.ir)
You may experience a tingling sensation, considerable pain, or numbness if the cyst is pressing on a nerve. (orionactivept.com)
The membrane has a nerve and blood supply and so can pass nutrients from the blood into the joint via the synovial fluid. (hygain.com.au)
Should the joint capsule become inflamed the nerve supply to the membrane will produce a sensation of pain and may result in lameness. (hygain.com.au)
Describe a case of discal cyst on the l4-l5 level with compression of l5 right nerve root treated successfully with a minimal invasive procedure. (bvsalud.org)

doi:10.1016/j.cjtee.2016.12.002, Klessinger S. The incidence of dural tears after complete resection of lumbar synovial cysts and the relation to the outcome. (expressextension.com)

Depending on the size, cysts may be firm or spongy [1]. (ac.ir)
The fluid can become thick over time, making the cyst feel firm and spongy. (orionactivept.com)

You can find sebaceous cysts most commonly on the scalp, face, neck, and back. (web.app)

Synovial fluid is secreted from cells in the synovial membrane that surrounds the joint. (hygain.com.au)

After entering the joint, the bacteria colonize the synovial membrane, produce an acute inflammatory response, and reach the synovial fluid. (bvsalud.org)

Spinal arachnoid cysts are subdivided into five types: 1) intramedullary cysts/syrinxes, 2) subdural extramedullary, 3) subdural/epidural, 4) intraspinal epidural, and 5) intraspinal/extraspinal. (biomedcentral.com)
Intraspinal epidural spinal arachnoid cysts are more common than other cyst types, followed by subdural extramedullary and intramedullary cysts/syrinxes. (biomedcentral.com)

They will be able to work with you to find the best ways of managing the cyst and any potential discomfort. (myrateam.com)
Some cysts are painless, but the majority cause some degree of discomfort. (orionactivept.com)

A bursa is a small sac of synovial fluid with a thin lining. (patient.info)

A fluid-filled cyst that develops at the back of the knee due to the accumulation of synovial fluid. (drchrisevensen.com)

Up to now, many treatment methods are available for these different spinal canal cysts. (biomedcentral.com)
However, same principle should be obeyed in surgical treatment despite of difference among spinal canal cysts, given open surgery is melely for symptomatic cyst. (biomedcentral.com)
Arachnoid cysts can be observed anywhere along the length of the spinal canal, middle, and lower thoracic regions, which constitute for the most frequently involved areas [ 20 ]. (biomedcentral.com)
For example, bone spurs, cysts, and narrowing of the spinal canal are typical effects seen in the older adult's spine. (expressextension.com)

Several players in the joint microenvironment mediate the synovial innate and adaptive immunological processes, eventually leading to clinical synovitis. (bvsalud.org)

Cysts look like nodules but they are filled with pus which can still rupture to cause even deeper infections. (progressivehealth.com)

The two major presentations of severe acne are nodules and cysts. (progressivehealth.com)

Classifications of cysts vary based on etiology, histopathology, and localization. (biomedcentral.com)
Cysts could also be classified according to their etiology. (biomedcentral.com)
However, such classifications need to be validated, because cysts at different locations could share the same etiology cause, and the same kind of cysts could be initiated by different factors of etiology. (biomedcentral.com)

Anatomy12

Diseases15

Chemicals and Drugs1

Analytical, Diagnostic and Therapeutic Techniques and Equipment3

Phenomena and Processes1

Type of cyst5

Filled with synovial fluid4

Baker's41

Cartilage15

Causing bone1

Osteoarthritis4

Joints11

Tissue13

Mucous4

Epidermoid cyst1

Secretes3

Diagnosis6

20212

Inflammation2

Rheumatoid arthritis1

Discal cysts2

Symptoms4

Ganglion30

Synovium3

Osteophytes1

Lesions6

Ligaments2

Carpal Tunnel S1

Tendon1

Knee joint1

Rarely1

Cavity1

Lesion1

Nerve6

Resection1

Spongy2

Commonly1

Surrounds1

Inflammatory1

Epidural2

Discomfort2

Bursa1

Back of the knee1

Spinal canal4

Innate1

Rupture1

Severe1

Etiology3