Epidural Abscess – Causes, Symptoms, Diagnosis, and Treatment in Adults and Children

An epidural abscess is a serious medical condition that involves the presence of infection and swelling in the area between the spinal cord and the outer covering of the spinal cord (the epidural space). This infection can lead to complications if not promptly diagnosed and treated.

One of the main causes of an epidural abscess is a bacterial infection that spreads to the epidural space. This can occur through the bloodstream, such as from a fever or other infection. Additionally, complications from surgery or spinal procedures can also lead to the development of an epidural abscess.

Symptoms of an epidural abscess may include severe back pain, fever, and weakness or numbness in the affected area or limbs. These symptoms can worsen over time if the abscess is not treated, leading to more severe complications.

Diagnosis of an epidural abscess typically involves imaging tests, such as an MRI or CT scan, to visualize the abscess and determine its location. Blood tests may also be conducted to identify the presence of infection markers. Early diagnosis is crucial in order to prevent further complications and provide timely treatment.

Treatment for an epidural abscess often involves a combination of antibiotics and surgery. The antibiotics are used to fight the infection, while surgery may be necessary to drain the abscess and remove any infected tissue. In some cases, rehabilitation and physical therapy may also be needed to regain strength and function after treatment.

What is an Epidural Abscess?

An epidural abscess is a serious infection that forms in the epidural space, which is a space located between the spinal cord and the protective covering of the spinal cord called the dura mater. The epidural space typically contains fat and blood vessels that cushion and nourish the spinal cord.

However, in cases of infection, bacteria can enter the epidural space and form an abscess. An abscess is a pocket of pus that forms as the body’s immune system tries to fight off the infection. This can lead to a build-up of pus and inflammation, causing pain, swelling, and other complications.

Surgery and Infection

Epidural abscesses are often caused by a bacterial infection. The bacteria can enter the epidural space through various means, such as a skin infection near the spine, an infection in the bloodstream, or a spinal procedure. Common bacteria that can cause an epidural abscess include Staphylococcus aureus and Streptococcus species.

Once the infection takes hold, it can lead to the formation of an abscess in the epidural space. If left untreated, the infection can spread and cause damage to the spinal cord and surrounding tissues.

Symptoms and Diagnosis

The symptoms of an epidural abscess can vary depending on the location and severity of the infection. Common symptoms include severe back pain, fever, weakness or numbness in the legs, difficulty walking or standing, and loss of bladder or bowel control.

To diagnose an epidural abscess, a doctor will typically perform a physical examination and order imaging tests, such as an MRI or CT scan, to visualize the spinal cord and epidural space. Blood tests may also be done to check for signs of infection.

Early diagnosis is important, as prompt treatment can help prevent complications and minimize the risk of permanent damage to the spinal cord.

Treatment

Treatment for an epidural abscess usually involves a combination of antibiotics and surgery. The antibiotics are used to help kill the bacteria causing the infection, while surgery may be necessary to drain the abscess and alleviate pressure on the spinal cord.

In some cases, a laminectomy may be performed to remove part of the spinal bone and provide access to the abscess. The abscess is then drained, and any infected tissue may be removed. Following surgery, a course of antibiotics is typically prescribed to help ensure the infection is fully cleared.

It’s important to seek medical attention if you experience symptoms of an epidural abscess, as early treatment can improve outcomes and prevent long-term complications.

Causes of Epidural Abscess

An epidural abscess is usually caused by a bacterial infection. The infection can occur when bacteria enter the space between the outer covering of the spinal cord and the bones of the spine, known as the epidural space. This can happen as a result of an infection elsewhere in the body that spreads to the spine, or it can be caused by direct contamination of the spinal area during surgery or trauma.

Common sources of infection that can lead to an epidural abscess include:

  • Infections in other parts of the body, such as skin or urinary tract infections, that spread to the spine through the bloodstream.
  • Infections in the spine, such as osteomyelitis (bone infection) or discitis (infection of the intervertebral discs), that can spread to the epidural space.
  • Recent spinal surgery or injections, which can introduce bacteria into the epidural space.

Once the bacteria enter the epidural space, they can multiply and cause inflammation and swelling. This leads to the formation of an abscess, which is a collection of pus. The swelling can put pressure on the spinal cord and nerves, causing pain and other symptoms.

Some risk factors that can increase the likelihood of developing an epidural abscess include:

  • Having a weakened immune system, such as from diabetes, HIV/AIDS, or taking immunosuppressive medications.
  • Having a history of spinal infections or other spinal conditions.
  • Injecting drugs, which can introduce bacteria into the bloodstream and increase the risk of infection.

If left untreated, an epidural abscess can lead to serious complications, such as paralysis, nerve damage, or meningitis. Therefore, it is important to seek medical attention if you experience symptoms such as fever, severe back pain, weakness or numbness in the limbs, or loss of bladder or bowel control.

Risk Factors for Epidural Abscess

Epidural abscess is a serious infection that occurs in the spinal area, specifically in the epidural space. This infection is characterized by the presence of pus, swelling, and inflammation in the area. While anyone can develop an epidural abscess, certain factors can increase the risk of developing this condition.

One of the main risk factors for epidural abscess is a previous infection in the spinal area. People who have had previous spinal infections, such as spinal meningitis or discitis, are more susceptible to developing an epidural abscess.

Other risk factors include:

  • Recent spinal surgery
  • Diabetes
  • Chronic immune system disorders, such as HIV/AIDS
  • Injection drug use
  • IV drug use
  • A weakened immune system
  • Complications from procedures such as epidural steroid injections
  • Prolonged use of intravenous catheters

Additionally, symptoms such as pain in the spinal area, fever, and neurological deficits can also be risk factors for epidural abscess. Prompt diagnosis and treatment are essential to prevent further complications and ensure a successful recovery.

Common Symptoms of Epidural Abscess

Epidural abscess is a serious condition that can cause complications if not treated promptly. It is important to be aware of the common symptoms of this condition so that it can be diagnosed and treated early.

Fever

A significant symptom of epidural abscess is the presence of fever. The body’s immune system responds to the infection by raising the body temperature. If you experience a persistent fever, it could be a sign of epidural abscess.

Severe Spinal Pain

Pain is a common symptom of epidural abscess. The infection causes inflammation and pressure on the nerves in the spinal cord, resulting in severe pain. This pain may radiate to other parts of the body, such as the arms or legs.

Swelling and Redness

Another symptom of epidural abscess is swelling and redness in the affected area. The infection causes inflammation and fluid buildup, leading to visible signs of swelling and redness at the site of the abscess.

If you notice any of these symptoms, it is important to seek medical attention immediately. Early diagnosis and treatment, often involving surgery, can help prevent complications and ensure a successful recovery from epidural abscess.

Diagnosing Epidural Abscess

Epidural abscess is a serious condition that requires prompt diagnosis and treatment. Early identification of the infection can help prevent complications and minimize potential damage to the spinal cord.

Symptoms

The symptoms of epidural abscess can vary depending on the location and extent of the infection. Common symptoms include severe back pain, fever, and muscle weakness. In some cases, patients may also experience numbness, tingling, or loss of sensation in the affected area.

Physical Examination

During a physical examination, a healthcare professional will assess the patient’s range of motion, reflexes, and muscle strength. They may also perform a neurological examination to check for any abnormalities in sensation or coordination. If there is suspicion of an epidural abscess, further diagnostic tests will be recommended.

Diagnostic Tests

To confirm the presence of an epidural abscess, a variety of diagnostic tests may be performed, including:

1 Magnetic Resonance Imaging (MRI)
2 Computed Tomography (CT) scan
3 Blood tests
4 Spinal tap (lumbar puncture)

MRI and CT scans can provide detailed images of the spinal cord and surrounding tissues, allowing healthcare professionals to visualize any inflammation, swelling, or abscess formation. Blood tests may reveal elevated white blood cell count and inflammatory markers, indicating an ongoing infection. A spinal tap may be performed to analyze cerebrospinal fluid for signs of infection.

Treatment

Once an epidural abscess is diagnosed, prompt treatment is necessary to prevent further complications. Depending on the severity of the infection and the patient’s overall health, treatment options may include intravenous antibiotics, surgical drainage of the abscess, or a combination of both. Pain management and physical therapy may also be recommended to facilitate the healing process and restore mobility.

Medical Tests for Epidural Abscess

Diagnosing an epidural abscess typically involves a combination of medical tests and physical examinations. Prompt diagnosis is crucial, as delays in treatment can lead to severe complications.

Physical Examination

During a physical examination, a healthcare provider will assess the patient’s symptoms, including any pain, swelling, or redness in the affected area. They will also evaluate the patient’s neurological function, such as their ability to move and feel sensations, to determine if there is any nerve damage.

Imaging Tests

Imaging tests are often used to confirm the presence of an epidural abscess and identify its location. The most common imaging techniques include:

  • Magnetic Resonance Imaging (MRI): This test uses powerful magnets and radio waves to create detailed images of the spinal area. An MRI can help visualize the location and extent of the abscess.
  • Computed Tomography (CT) Scan: A CT scan combines X-rays and computer technology to create cross-sectional images of the spine. It can provide detailed information about the abscess, including its size and effect on nearby structures.

Laboratory Tests

To support the diagnosis of an epidural abscess, laboratory tests may be performed, including:

  • Complete Blood Count (CBC): This test measures the number of white blood cells, as an increased count may indicate an infection.
  • Culture and Sensitivity: A sample of fluid or tissue from the abscess may be collected and sent to the laboratory for analysis. This can help identify the specific bacteria causing the infection and determine the most effective antibiotic treatment.

If an epidural abscess is suspected, these medical tests can help confirm the diagnosis and guide appropriate treatment decisions. Prompt medical intervention, including surgery to drain the abscess, is often necessary to prevent further complications and promote recovery. It is important for individuals experiencing symptoms such as fever, back pain, or neurological deficits to seek medical attention promptly.

Treatment Options for Epidural Abscess

Treatment for epidural abscess typically involves a combination of medical management and surgical intervention. Prompt and aggressive treatment is essential to prevent the spread of infection and potential complications.

Medical management primarily focuses on the use of antibiotics to control the infection. A course of intravenous antibiotics is usually started as soon as the diagnosis is made or suspected. The choice of antibiotics depends on the suspected bacteria and the patient’s overall health and any known allergies.

In addition to antibiotics, pain medication may be prescribed to alleviate discomfort. Fever-reducing medications, such as acetaminophen, may also be given to help bring down fever associated with the infection.

However, in many cases, surgical intervention is necessary to effectively treat epidural abscess. The main goal of surgery is to drain the abscess and remove any infected tissue. This can be done through a procedure called an abscess incision and drainage.

In some cases, spinal surgery may be required if there is significant compression of the spinal cord or nerve roots due to the abscess. This can involve removing part of the vertebrae to relieve pressure on the spinal cord.

Complications can arise from epidural abscess, so close monitoring is essential during treatment. These complications can include spinal cord damage, paralysis, and permanent neurological deficits. Prompt treatment and aggressive intervention can help minimize the risk of these complications.

After treatment, follow-up care is necessary to ensure that the infection has been completely cleared and to watch for any signs of recurrence. This may include additional imaging studies, such as MRI, to assess the healing process and to ensure that there is no residual abscess or swelling.

In conclusion, the treatment of epidural abscess typically involves a combination of antibiotics and surgical intervention. Prompt diagnosis and treatment are crucial to prevent the spread of infection and potential complications. Close monitoring during the treatment period is essential to minimize the risk of long-term complications.

Surgical Intervention for Epidural Abscess

When conservative treatment options fail to effectively manage an epidural abscess or if the infection is severe, surgical intervention may be necessary. Surgery is typically performed to drain the abscess and remove any infected tissue in order to prevent further spread of the infection and alleviate symptoms.

There are several indications for surgical intervention in cases of epidural abscess:

  • Development of neurological deficits
  • Worsening pain or paralysis
  • Failure to respond to non-surgical treatments
  • Presence of multiple abscesses
  • Signs of spinal instability or compression
  • Recurrent or persistent fever despite appropriate antibiotic therapy

The surgical procedure for epidural abscess typically involves making an incision in the affected area of the spine, followed by drainage of the abscess and removal of any necrotic or infected tissue. In some cases, spinal instrumentation may be necessary to stabilize the spine.

Complications associated with surgery for epidural abscess are relatively rare, but can include wound infections, blood clots, nerve damage, and spinal fluid leaks. However, the benefits of surgery in terms of preventing further neurological damage and restoring function often outweigh the risks.

Post-surgical care for epidural abscess may involve a course of antibiotics, as well as physical therapy and rehabilitation to aid in recovery and regain strength and mobility.

In summary, surgical intervention for epidural abscess is typically reserved for cases where conservative treatments have failed or when the infection is severe. The goals of surgery are to drain the abscess, remove infected tissue, and prevent further complications. Although there are risks associated with surgery, it is often necessary to prevent permanent neurological damage and restore function.

Antibiotic Therapy for Epidural Abscess

Antibiotic therapy is an essential component in the treatment of epidural abscess. The main goal of antibiotic therapy is to eliminate the infection that is causing the abscess and prevent its spread to other parts of the body. It is crucial to start antibiotic treatment as soon as possible to prevent complications.

Choosing the Right Antibiotics

The choice of antibiotics for epidural abscess depends on the suspected or identified causative organism. In most cases, a broad-spectrum antibiotic that can cover a wide range of bacteria is initially prescribed. As the specific causative organism is identified through laboratory tests, the antibiotic regimen can be adjusted accordingly to target the specific bacteria causing the infection.

Duration of Antibiotic Treatment

The duration of antibiotic therapy for epidural abscess is typically prolonged, ranging from 4 to 6 weeks. This prolonged treatment duration is necessary to ensure complete eradication of the infection and prevent recurrence. It is important to follow the prescribed antibiotic regimen and complete the full course of treatment, even if symptoms improve before the scheduled end of treatment.

During antibiotic therapy, it is common for patients with epidural abscess to experience a reduction in symptoms such as fever, pain, and swelling. However, this does not necessarily indicate complete resolution of the abscess. Imaging studies, such as MRI or CT scans, may be performed periodically to monitor the progress of the abscess and guide the duration of antibiotic therapy.

In some cases, surgical intervention may be necessary to drain the abscess if it becomes large or causes neurological complications. Antibiotics may be continued after surgery to ensure complete eradication of the infection.

It is important to follow the recommended antibiotic therapy regimen for epidural abscess and attend regular follow-up appointments with the healthcare provider to monitor the progress and prevent any potential complications.

Preventing Epidural Abscess

Epidural abscess is a serious condition that can cause severe complications and pain. However, there are ways to help prevent the development of an epidural abscess and reduce the risk of infection.

One of the key ways to prevent epidural abscess is to practice proper hygiene and cleanliness. This includes maintaining good hand hygiene by washing your hands frequently with soap and water or using hand sanitizer. It is also important to keep any wounds clean and covered to prevent bacteria from entering the body.

Additionally, it is crucial to promptly treat any infections in the body, especially those affecting the skin and soft tissues. Prompt treatment can help prevent the spread of infection to the epidural space and reduce the risk of developing an abscess.

If you have a spinal procedure or surgery, it is important to follow your healthcare provider’s instructions for wound care and infection prevention. This may include keeping the surgical site clean and dry, changing bandages regularly, and taking prescribed antibiotics as directed.

It is essential to monitor any signs and symptoms that may indicate the presence of an epidural abscess. These may include persistent pain in the spine, fever, and neurological changes. If you experience any of these symptoms, it is important to seek medical attention promptly for proper diagnosis and treatment.

Overall, preventing epidural abscess involves practicing good hygiene, promptly treating infections, and following healthcare provider’s instructions after spinal procedures. By taking proper precautions, individuals can reduce the risk of developing this serious condition and its associated complications.

Complications of Epidural Abscess

Epidural abscess is a serious infection that affects the epidural space, which is the area between the spinal cord and the protective covering of the spinal cord. If left untreated, epidural abscess can lead to various complications:

Pain and Swelling: The presence of an epidural abscess can cause severe pain and swelling in the infected area. This can make it difficult for patients to move or perform daily activities.

Fever: In many cases, epidural abscess is accompanied by fever, which is the body’s natural response to infection. The fever can be persistent and may require medical attention.

Spinal Cord Compression: If the abscess grows large enough, it can compress the spinal cord and cause neurological symptoms, such as weakness or numbness in the limbs. In severe cases, this can lead to paralysis.

Spinal Deformity: Chronic infection and inflammation from an epidural abscess can cause damage to the surrounding tissues and structures. This can lead to spinal deformities, such as kyphosis or scoliosis.

Spread of Infection: In some cases, the infection from an epidural abscess can spread to other parts of the body, such as the bloodstream or the brain. This can lead to life-threatening complications, such as sepsis or meningitis.

Need for Surgery: In severe cases, surgical intervention may be necessary to drain the abscess and remove the infected tissue. Surgery can be complex and may carry additional risks and complications.

It is important to seek medical attention if you experience symptoms of an epidural abscess, such as persistent back pain, fever, or neurological symptoms. Early diagnosis and treatment can help minimize the risk of complications and improve outcomes.

Prognosis for Epidural Abscess

Epidural abscess is a serious condition that can cause severe pain and neurological complications if left untreated. The prognosis for epidural abscess depends on several factors, including the underlying cause, the severity of the infection, and the promptness of treatment.

Causes and Infection

Epidural abscesses are most commonly caused by bacteria, such as Staphylococcus aureus, that enter the body through a wound or infection elsewhere in the body. The bacteria can then travel through the bloodstream and infect the epidural space, causing swelling and the formation of an abscess. If the infection is not promptly treated, it can spread and cause further complications.

Treatment and Complications

The most common treatment for epidural abscess is surgery to drain the abscess and remove any infected tissue. In some cases, antibiotics may also be prescribed to help fight the infection. Prompt treatment is essential in order to prevent the spread of the infection and reduce the risk of neurological complications.

If left untreated, epidural abscess can lead to serious complications, including permanent nerve damage, paralysis, and even death. This is why it is crucial to seek immediate medical attention if you experience symptoms such as severe back pain, fever, or neurological changes.

In conclusion, the prognosis for epidural abscess depends on the promptness of treatment and the severity of the infection. With early diagnosis and appropriate treatment, most patients can expect a full recovery with minimal complications. However, without timely intervention, the risk of long-term complications and adverse outcomes increases significantly.

Recovery Process for Epidural Abscess

After undergoing treatment for an epidural abscess, the recovery process is crucial for the patient. The length of the recovery period can vary depending on the severity of the infection and the individual’s overall health.

During the recovery process, it is common for patients to experience some residual pain and discomfort. The abscess may have caused inflammation and swelling in the spinal area, which can take time to subside. Pain medication may be prescribed to manage any lingering discomfort.

It is important for patients to closely follow their healthcare provider’s instructions for wound care. In some cases, the abscess may have required surgical drainage, and proper care of the incision site is necessary to prevent further infection. The wound should be kept clean and dry, and any signs of infection, such as increased redness, swelling, or drainage, should be reported to the healthcare provider immediately.

During the recovery period, it is common for patients to have regular follow-up appointments with their healthcare provider. These appointments allow the provider to monitor the healing process and address any concerns or complications. Additionally, any necessary imaging tests may be performed to ensure that the abscess has been fully treated and there are no remaining complications.

It is important for patients to take good care of their overall health during the recovery process. Eating a healthy diet, getting plenty of rest, and staying hydrated can all contribute to a smoother recovery. Physical activity should be gradually resumed as recommended by the healthcare provider.

It is possible for some patients to experience complications during the recovery process, such as recurrent or persistent infection. In such cases, further treatment may be necessary, including a longer course of antibiotics or additional surgical intervention.

Overall, the recovery process for epidural abscess can vary from individual to individual, but with proper medical care, follow-up visits, and a healthy lifestyle, most patients can expect a full recovery and a return to their normal daily activities.

Long-Term Effects of Epidural Abscess

Epidural abscess is a serious condition that can have long-term effects on the affected individual. If left untreated or if not treated promptly and effectively, an epidural abscess can lead to various complications.

  • Infection: The main long-term effect of an epidural abscess is the persistence of infection in the spinal area. The abscess is typically filled with pus, which contains bacteria. If the infection is not completely eradicated, it can continue to cause symptoms and discomfort in the long run.
  • Pain: Chronic pain is another common long-term effect of an epidural abscess. The inflammation caused by the infection and the pressure put on the surrounding nerves and tissues can lead to persistent pain in the back, neck, or limbs.
  • Neurological complications: In some cases, an untreated or undertreated epidural abscess can result in neurological complications. The abscess can put pressure on the spinal cord or nerves, leading to symptoms such as weakness, numbness, tingling, or even paralysis in severe cases.
  • Surgical interventions: In more severe cases or cases that do not respond well to conservative treatment, surgery may be needed to remove the abscess and alleviate the symptoms. Surgery, however, comes with its own risks and potential complications.
  • Swelling and deformity: The presence of an abscess can cause swelling and deformity in the affected area. This can lead to long-term changes in the appearance and function of the spine or affected body part.
  • Fever and systemic infection: If the infection spreads beyond the spinal area, it can lead to systemic infection. This can result in symptoms such as fever, chills, fatigue, and overall malaise.

It is important to seek prompt medical attention if you suspect an epidural abscess to minimize the risk of long-term effects and complications. Early diagnosis, appropriate treatment, and diligent follow-up care are crucial in managing this condition effectively.

Support and Resources for Epidural Abscess Patients

Being diagnosed with an epidural abscess can be overwhelming and frightening. However, there are support and resources available to help patients navigate through their condition and provide them with the necessary information and assistance they need.

Medical Professionals

The key to managing an epidural abscess effectively is working with a team of experienced medical professionals. Seek out specialists such as neurologists, infectious disease specialists, and neurosurgeons who have expertise in treating spinal conditions. These professionals can offer guidance, provide treatment options, and monitor your progress throughout your recovery journey.

Support Groups

Connecting with others who have experienced or are currently dealing with an epidural abscess can provide valuable emotional support. Joining support groups, either in-person or online, allows patients to share their experiences, ask questions, and learn from one another. These groups can be a source of comfort and encouragement during difficult times.

Educational Materials

Understanding your condition is crucial. Educate yourself about epidural abscesses by reading reliable sources of information such as medical journals, research articles, or reputable websites. This knowledge can help you make informed decisions about your treatment plan and recognize any potential complications or symptoms that may arise.

Additionally, reach out to patient organizations or advocacy groups dedicated to epidural abscesses. These organizations often provide educational resources, brochures, and pamphlets that include thorough explanations of the condition, treatment options, and tips for self-care.

Financial Assistance

Epidural abscesses may require surgery and prolonged medical treatment, which can be expensive. Investigate resources that can help alleviate the financial burden associated with the condition. Research government programs, non-profit organizations, or foundations that offer financial aid to individuals with serious medical conditions. You may also be eligible for disability benefits or insurance coverage for your treatment.

  • Speak to a social worker or financial counselor at your healthcare institution for assistance in navigating these resources.
  • Consider reaching out to charitable organizations that provide financial support for medical expenses.

Remember, you are not alone in your journey with an epidural abscess. Utilize the available resources and support systems to help you manage pain, complications, and emotional challenges that may arise. Stay informed, seek guidance from healthcare professionals, and connect with others who understand what you are going through.

Q&A:

What is an epidural abscess?

An epidural abscess is a collection of pus that forms between the protective covering of the spinal cord (dura mater) and the bones of the spine.

What causes an epidural abscess?

An epidural abscess is usually caused by a bacterial infection, which can enter the body through a skin wound or spread from an infection in another part of the body.

What are the symptoms of an epidural abscess?

The symptoms of an epidural abscess can vary, but common symptoms include back pain, fever, weakness or numbness in the legs, difficulty walking, and loss of bladder or bowel control.

How is an epidural abscess diagnosed?

An epidural abscess is usually diagnosed through a combination of medical history, physical examination, and imaging tests such as MRI or CT scan. Blood tests may also be done to check for signs of infection.

What is the treatment for an epidural abscess?

The treatment for an epidural abscess usually involves surgical drainage of the abscess and administration of antibiotics to fight the infection. In some cases, surgery may be needed to remove any infected or damaged tissue.

What is an epidural abscess?

An epidural abscess is a collection of pus in the space between the spinal cord and the protective covering of the spinal cord called the dura.

What are the common causes of epidural abscess?

The most common cause of epidural abscess is a bacterial infection, typically caused by Staphylococcus aureus bacteria. Other causes include a spreading infection from nearby structures, such as the spine, skin, or urinary tract, or direct introduction of bacteria during a spinal procedure.

What are the symptoms of epidural abscess?

The symptoms of epidural abscess can vary, but commonly include back pain, fever, weakness or numbness in the legs or arms, and difficulty with bowel or bladder control. In severe cases, it can lead to paralysis or loss of sensation.

How is epidural abscess diagnosed?

Epidural abscess is diagnosed through a combination of medical history, physical examination, and imaging tests such as magnetic resonance imaging (MRI) or computed tomography (CT) scan. Blood tests may also be done to detect infection.