Guillain–Barré syndrome

Guillain-Barré syndrome
Classification and external resources
ICD-10 G61.0
ICD-9 357.0
OMIM 139393
DiseasesDB 5465
MedlinePlus 000684
eMedicine emerg/222 neuro/7 pmr/48 neuro/598
MeSH D020275

Guillain–Barré syndrome (GBS) (French pronunciation: [ɡiˈlɛ̃ baˈʁe], English pronunciation: /ˈɡlænˈbɑr/), sometimes called Landry's paralysis, is an acute inflammatory demyelinating polyneuropathy (AIDP), a disorder affecting the peripheral nervous system. Ascending paralysis, weakness beginning in the feet and hands and migrating towards the trunk, is the most typical symptom. It can cause life-threatening complications, particularly if the breathing muscles are affected or if there is dysfunction of the autonomic nervous system. The disease is usually triggered by an acute infection. Guillain–Barré syndrome is a form of peripheral neuropathy.

The diagnosis is usually made by nerve conduction studies. With prompt treatment by intravenous immunoglobulins or plasmapheresis, together with supportive care, the majority will recover completely. Guillain–Barré syndrome is rare, at 1–2 cases per 100,000 people annually, but is one of the leading causes of acute non-trauma-related paralysis in the world. The syndrome is named after the French physicians Georges Guillain and Jean Alexandre Barré, who described it in 1916.

Contents

Classification

Six different subtypes of Guillain–Barré syndrome exist:[citation needed]

  • Acute inflammatory demyelinating polyneuropathy (AIDP) is the most common form of GBS, and the term is often used synonymously with GBS. It is caused by an auto-immune response directed against Schwann cell membranes.
  • Miller Fisher syndrome (MFS) is a rare variant of GBS and manifests as a descending paralysis, proceeding in the reverse order of the more common form of GBS. It usually affects the eye muscles first and presents with the triad of ophthalmoplegia, ataxia, and areflexia. Anti-GQ1b antibodies are present in 90% of cases.
  • Acute motor axonal neuropathy (AMAN),[1] also known as Chinese paralytic syndrome, attacks motor nodes of Ranvier and is prevalent in China and Mexico. It is probably due to an auto-immune response directed against the axoplasm of peripheral nerves. The disease may be seasonal and recovery can be rapid. Anti-GD1a antibodies[2] are present. Anti-GD3 antibodies are found more frequently in AMAN.
  • Acute motor sensory axonal neuropathy (AMSAN) is similar to AMAN but also affects sensory nerves with severe axonal damage. Like AMAN, it is probably due to an auto-immune response directed against the axoplasm of peripheral nerves. Recovery is slow and often incomplete.[3]
  • Acute panautonomic neuropathy is the most rare variant of GBS, sometimes accompanied by encephalopathy. It is associated with a high mortality rate, owing to cardiovascular involvement, and associated dysrhythmias. Impaired sweating, lack of tear formation, photophobia, dryness of nasal and oral mucosa, itching and peeling of skin, nausea, dysphagia, constipation unrelieved by laxatives or alternating with diarrhea occur frequently in this patient group. Initial nonspecific symptoms of lethargy, fatigue, headache, and decreased initiative are followed by autonomic symptoms including orthostatic lightheadedness, blurring of vision, abdominal pain, diarrhea, dryness of eyes, and disturbed micturition. The most common symptoms at onset are related to orthostatic intolerance, as well as gastrointestinal and sudomotor dysfunction (Suarez et al. 1994). Parasympathetic impairment (abdominal pain, vomiting, constipation, ileus, urinary retention, dilated unreactive pupils, loss of accommodation) may also be observed.
  • Bickerstaff's brainstem encephalitis (BBE), is a further variant of Guillain–Barré syndrome. It is characterized by acute onset of ophthalmoplegia, ataxia, disturbance of consciousness, hyperreflexia or Babinski's sign. The course of the disease can be monophasic or remitting-relapsing. Large, irregular hyperintense lesions located mainly in the brainstem, especially in the pons, midbrain and medulla are described in the literature. BBE despite severe initial presentation usually has a good prognosis. Magnetic resonance imaging (MRI) plays a critical role in the diagnosis of BBE. A considerable number of BBE patients have associated axonal Guillain–Barré syndrome, indicative that the two disorders are closely related and form a continuous spectrum.

Signs and symptoms

The disorder is characterized by symmetrical weakness which usually affects the lower limbs first, and rapidly progresses in an ascending fashion. Patients generally notice weakness in their legs, manifesting as "rubbery legs" or legs that tend to buckle, with or without dysesthesias (numbness or tingling). As the weakness progresses upward, usually over periods of hours to days, the arms and facial muscles also become affected. Frequently, the lower cranial nerves may be affected, leading to bulbar weakness, oropharyngeal dysphagia (drooling, or difficulty swallowing and/or maintaining an open airway) and respiratory difficulties. Most patients require hospitalization and about 30% require ventilatory assistance for treatment of Type II respiratory failure.[4] [5] Facial weakness is also commonly a feature, but eye movement abnormalities are not commonly seen in ascending GBS, but are a prominent feature in the Miller-Fisher variant (see below.) Sensory loss, if present, usually takes the form of loss of proprioception (position sense) and areflexia (complete loss of deep tendon reflexes), an important feature of GBS. Loss of pain and temperature sensation is usually mild. In fact, pain is a common symptom in GBS, presenting as deep aching pain, usually in the weakened muscles, which patients compare to the pain from overexercising. These pains are self-limited and should be treated with standard analgesics. Bladder dysfunction may occur in severe cases but should be transient. If severe, spinal cord disorder should be suspected.

Fever should not be present, and if it is, another cause should be suspected.

In severe cases of GBS, loss of autonomic function is common, manifesting as wide fluctuations in blood pressure, orthostatic hypotension, and cardiac arrhythmias.

Acute paralysis in Guillain–Barré syndrome may be related to sodium channel blocking factor in the cerebrospinal fluid (CSF). Significant issues involving intravenous salt and water administration may occur unpredictably in this patient group, resulting in SIADH. SIADH is one of the causes of hyponatremia and can be accompanied with various conditions such as malignancies, infections and nervous system diseases. Symptoms of Guillain-Barré syndrome such as general weakness, decreased consciousness, and seizure are similar to those of hyponatremia

The symptoms of Guillain–Barré syndrome are also similar to those for progressive inflammatory neuropathy.[6]

Cause

Structure of a typical neuron
Neuron
At one end of an elongated structure is a branching mass. At the centre of this mass is the nucleus and the branches are dendrites. A thick axon trails away from the mass, ending with further branching which are labeled as axon terminals. Along the axon are a number of protuberances labeled as myelin sheaths.
Axon terminal
Myelin sheath

All forms of Guillain–Barré syndrome are due to an immune response to foreign antigens (such as infectious agents) that is mistargeted at host nerve tissues instead. The targets of such immune attack are thought to be gangliosides, compounds naturally present in large quantities in human nerve tissues. The most common antecedent infection is the bacterium Campylobacter jejuni.[7][8] However, 60% of cases do not have a known cause. One study suggests that a minority of cases may be triggered by the influenza virus, or by an immune reaction to the influenza virus.[9]

The end result of such autoimmune attack on the peripheral nerves is damage to the myelin, the fatty insulating layer of the nerve, and a nerve conduction block, leading to a muscle paralysis that may be accompanied by sensory or autonomic disturbances.

However, in mild cases, nerve axon (the long slender conducting portion of a nerve) function remains intact and recovery can be rapid if remyelination occurs. In severe cases, axonal damage occurs, and recovery depends on the regeneration of this important tissue. Recent studies on the disorder have demonstrated that approximately 80% of the patients have myelin loss, whereas, in the remaining 20%, the pathologic hallmark of the disorder is indeed axon loss.

Guillain-Barré, unlike disorders such as multiple sclerosis (MS) and Lou Gehrig's disease (ALS), is a peripheral nerve disorder and does not generally cause nerve damage to the brain or spinal cord.

Influenza

Becoming infected with influenza increases both the risk of developing GBS and the risk of death (up to 1 in 10,000 who get influenza will die from it). While influenza vaccines have sometimes been suspected to raise the incidence of GBS, the evidence is equivocal, as shown below. Moreover, the highest level of suspected risks from the influenza vaccine is less than one-tenth the risk from the influenza disease itself, as discussed in more detail in the next section.[10][11][12]

Influenza vaccine

GBS may be a rare side-effect of influenza vaccines; a study of the Vaccine Adverse Event Reporting System (VAERS) indicates that it is reported as an adverse event potentially associated with the vaccine at a rate of 1 per million vaccines (over the normal risk).[13] There were reports of GBS affecting 10 per million who had received swine flu immunizations in the 1976 U.S. outbreak of swine flu—25 of which resulted in death from severe pulmonary complications, leading the United States Center of Disease Control to end that immunization campaign within the United States. (By comparison, the average flu season kills around 30,000 people in the United States).[14] However, the role of the vaccine even in those 25 cases in 1976 has remained unclear, partly because GBS had an unknown but very low incidence rate in the general population making it difficult to assess whether the vaccine was really increasing the risk for GBS. Later research has pointed to the absence of, or only a very small increase in, the GBS risk due to the 1976 swine flu vaccine.[15] Furthermore, the GBS may not have been directly due to the vaccine but to a bacterial contamination of the 1976 vaccine.[16]

Since 1976, no other influenza vaccines have been linked to GBS, though as a precautionary principle, caution is advised for certain individuals, particularly those with a history of GBS.[17][18]

From October 6 to November 24, 2009, the U.S. CDC, through the VAERS reporting system, received ten reports of Guillain-Barré syndrome cases associated with the H1N1 vaccine and identified two additional probable cases from VAERS reports (46.2 million doses were distributed within the U.S. during this time). Only four cases, however, meet the Brighton Collaboration case criteria for Guillain–Barré syndrome, while four do not meet the criteria and four remain under review.[19] A preliminary report by the CDC's Emerging Infections Programs (EIP) calculates the rate of GBS observed in patients who previously received the 2009 H1N1 influenza vaccination is an excess of 0.8 per million cases, which is on par with the rate seen with the seasonal trivalent influenza vaccine.[20]

Although one review gives an incidence of about one case per million vaccinations,[21] a large study in China, reported in the NEJM covering close to 100 million doses of vaccine against the 2009 H1N1 "swine" flu found only eleven cases of Guillain-Barré syndrome (0.1 per million) total incidence in persons vaccinated, actually lower than the normal rate of the disease in China, and no other notable side effects; "The risk-benefit ratio, which is what vaccines and everything in medicine is about, is overwhelmingly in favor of vaccination."[22]

Diagnosis

The diagnosis of GBS usually depends on findings such as rapid development of muscle paralysis, areflexia, absence of fever, and a likely inciting event. Cerebrospinal fluid analysis (through a lumbar spinal puncture) and electrodiagnostic tests of nerves and muscles (such as nerve conduction studies) are common tests ordered in the diagnosis of GBS.

Typical CSF findings include albumino-cytological dissociation. As opposed to infectious causes, this is an elevated protein level (100–1000 mg/dL), without an accompanying increased cell count pleocytosis. A sustained increased white blood cell count may indicate an alternative diagnosis such as infection.
  • Electrodiagnostics
Electromyography (EMG) and nerve conduction study (NCS) may show prolonged distal latencies, conduction slowing, conduction block, and temporal dispersion of compound action potential in demyelinating cases. In primary axonal damage, the findings include reduced amplitude of the action potentials without conduction slowing.

Diagnostic criteria

Required:[citation needed]

  • Progressive, relatively symmetrical weakness of two or more limbs due to neuropathy
  • Areflexia
  • Disorder course < 4 weeks
  • Exclusion of other causes (see below)

Supportive:[citation needed]

  • relatively symmetric weakness accompanied by numbness and/or tingling
  • mild sensory involvement
  • facial nerve or other cranial nerve involvement
  • absence of fever
  • typical CSF findings obtained from lumbar puncture
  • electrophysiologic evidence of demyelination from electromyogram

Differential diagnosis:[citation needed]

Management

Supportive care with monitoring of all vital functions is the cornerstone of successful management in the acute patient. Of greatest concern is respiratory failure due to paralysis of the diaphragm. Early intubation should be considered in any patient with a vital capacity (VC) <20 ml/kg, a negative inspiratory force (NIF) that is less negative (i.e., closer to zero) than -25 cmH2O, more than 30% decrease in either VC or NIF within 24 hours, rapid progression of disorder, or autonomic instability.

Once the patient is stabilized, treatment of the underlying condition should be initiated as soon as possible. Either high-dose intravenous immunoglobulins (IVIg) at 400 mg/kg for 5 days or plasmapheresis can be administered,[23][24] as they are equally effective and a combination of the two is not significantly better than either alone. Therapy is no longer effective two weeks after the first motor symptoms appear, so treatment should be instituted as soon as possible. IVIg is usually used first because of its ease of administration and safety profile, with a total of five daily infusions for a total dose of 2 g/kg body weight (400 mg/kg each day). The use of intravenous immunoglobulins is not without risk, occasionally causing hepatitis, or in rare cases, renal failure if used for longer than five days. Glucocorticoids have not been found to be effective in GBS. If plasmapheresis is chosen, a dose of 40-50 mL/kg plasma exchange (PE) can be administered four times over a week.

Following the acute phase, the patient may also need rehabilitation to regain lost functions. This treatment will focus on improving ADL (activities of daily living) functions such as brushing teeth, washing, and getting dressed. Depending on the local structuring on health care, a team of different therapists and nurses will be established according to patient needs. An occupational therapist can offer equipment (such as wheelchair and special cutlery) to help the patient achieve ADL independence. A physiotherapist would plan a progressive training program and guide the patient to correct functional movement, avoiding harmful compensations which might have a negative effect in the long run. There is also some evidence supporting physiotherapy in helping patients with Guillain–Barré syndrome regain strength, endurance, and gait quality,[25] as well as helping them prevent contractures, bedsores, and cardiopulmonary difficulties.[26] A speech and language therapist would be essential in the patient regaining speaking and swallowing ability if they were intubated and received a tracheostomy. The speech and language therapist would also offer advice to the medical team regarding the swallowing abilities of the patient and would help the patient regain their communication ability pre-dysarthria. There would also be a doctor, nurse and other team members involved, depending on the needs of the patient. This team contribute their knowledge to guide the patient towards his or her goals, and it is important that all goals set by the separate team members are relevant for the patient's own priorities. After rehabilitation the patient should be able to function in his or her own home and attend necessary training as needed.

Prognosis

Most of the time recovery starts after the fourth week from the onset of the disorder. Approximately 80% of patients have a complete recovery within a few months to a year, although minor findings may persist, such as areflexia. About 5–10% recover with severe disability, with most of such cases involving severe proximal motor and sensory axonal damage with inability of axonal regeneration. However, this is a grave disorder and despite all improvements in treatment and supportive care, the death rate among patients with this disorder is still about 2–3% even in the best intensive care units. Worldwide, the death rate runs slightly higher (4%), mostly from a lack of availability of life support equipment during the lengthy plateau lasting four to six weeks, and in some cases up to one year, when a ventilator is needed in the worst cases. About 5–10% of patients have one or more late relapses, in which case they are then classified as having chronic inflammatory demyelinating polyneuropathy (CIDP).

Poor prognostic factors include: 1) age, over 40 years, 2) history of preceding diarrheal illness, 3) requiring ventilator support, 4) high anti-GM1 titre and 5) poor upper limb muscle strength.

Epidemiology

The incidence of GBS during pregnancy is 1.7 cases per 100,000 of the population.[27] The mother will generally improve with treatment but death of the fetus is a risk. The risk of Guillain–Barré syndrome increases after delivery, particularly during the first two weeks postpartum. There is evidence of Campylobacter jejuni as an antecedent infection in approximately 26% of disease cases, requiring special care in the preparation and handling of food. Congenital and neonatal Guillain–Barré syndrome have also been reported.[28]

History

The disorder was first described by the French physician Jean Landry in 1859. In 1916, Georges Guillain, Jean Alexandre Barré, and André Strohl diagnosed two soldiers with the illness and discovered the key diagnostic abnormality of increased spinal fluid protein production, but normal cell count.[29]

GBS is also known as acute idiopathic polyradiculoneuritis, acute idiopathic polyneuritis, French polio, Landry's ascending paralysis and Landry Guillain Barré syndrome.

Canadian neurologist C. Miller Fisher described the variant that bears his name in 1956.[30]

Notable cases

American actor Andy Griffith developed Guillain-Barré syndrome in 1983. Griffith is seen here receiving an award at the White House in 2005

References

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Look at other dictionaries:

  • Guillain-Barré syndrome — [gē lan΄bä rā′, gēlan′bä rā′] n. [after G. Guillain & J. Barré, 20th c. Fr neurologists] an acute neurological disorder of unknown cause, involving partial paralysis of several muscle groups and occurring rarely after certain viral infections and …   English World dictionary

  • Guillain-Barré syndrome — Infobox Disease Name = Guillain Barré syndrome Caption = DiseasesDB = 5465 ICD10 = ICD10|G|61|0|g|60 ICD9 = ICD9|357.0 ICDO = OMIM = 139393 MedlinePlus = 000684 eMedicineSubj = emerg eMedicineTopic = 222 eMedicine mult = eMedicine2|neuro|7… …   Wikipedia

  • Guillain-Barre syndrome — This disorder is characterized by progressive symmetrical paralysis and loss of reflexes, usually beginning in the legs, with in most cases nearly complete or complete recovery. The Guillain Barre syndrome is not associated with fever (although… …   Medical dictionary

  • Guillain-Barre syndrome — noun a form of peripheral polyneuritis characterized by pain and weakness and sometimes paralysis of the limbs; cause is unknown • Syn: ↑infectious polyneuritis, ↑Landry s paralysis • Hypernyms: ↑polyneuritis, ↑multiple neuritis * * *… …   Useful english dictionary

  • Guillain–Barré syndrome — [ˌgɪjaGuillain–Barré syndrome bareɪ] noun Medicine an acute disorder of the peripheral nerves causing weakness and often paralysis of the limbs. Origin 1916: named after the French physicians G. Guillain and J. Barré, who described the syndrome …   English new terms dictionary

  • Guillain-Barré syndrome — noun Etymology: Georges Guillain died 1961 French physician and Jean A. Barré died 1967 French neurologist Date: 1939 a polyneuritis of unknown cause characterized especially by muscle weakness and paralysis …   New Collegiate Dictionary

  • Guillain-Barré syndrome — /gee yan beuh ray /, Pathol. an uncommon, usually self limited form of polyneuritis, occurring after a viral illness or immunization and manifested by loss of muscle strength, loss of or altered sensation and sometimes paralysis. [after French… …   Universalium

  • Guillain-Barré syndrome — postinfective polyneuropathy a disease of the peripheral nerves in which there is numbness and weakness in the limbs. It usually develops 1–28 days after a respiratory or gastrointestinal infection (commonly with Campylobacter) that provokes an… …   The new mediacal dictionary

  • Guillain-Barré syndrome — /gilæn ˈbareɪ sɪndroʊm/ (say geelan bahray sindrohm) noun Medicine a disorder in which the body s immune system attacks part of the peripheral nervous system, causing weakness or tingling sensations in the arms, legs, and upper body which can be… …   Australian English dictionary

  • Guillain-Barre syndrome — (= Landry G B syndrome) Acute infective polyneuritis, associated with cytomegalovirus infection, in which there is cell mediated immunity to a component of myelin; the disease may be autoimmune in origin. Causes a temporary paralysis,… …   Dictionary of molecular biology


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