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Understanding Autoimmune Disease: A Guide to ADEM

Autoimmune diseases are like uninvited guests—they show up unexpectedly and can wreak havoc on your body. One such condition that often flies under the radar is Acute Disseminated Encephalomyelitis (ADEM). If you’ve never heard of it, don’t worry—you’re not alone. ADEM is rare, but understanding it can make a world of difference for those affected... This inflammation can cause a range of neurological symptoms, and while it can happen to anyone, it’s most common in kids and young adults. Imagine your body’s defense system going rogue—that’s ADEM in a nutshell.

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 What is ADEM?

ADEM is a rare, inflammatory, neurological disorder seen in children and young adults. It also has associations with chronic conditions like multiple sclerosis. These patients usually present a few weeks after an upper respiratory tract infection with confusion, headache and sudden onset neurological symptoms. ADEM can be tricky to diagnose

Articles of Interest

Acute disseminated encephalomyelitis (ADEM)

The clinical presentation of ADEM is heterogeneous. Typically, patients show prodromal symptoms such as fever, headache, malaise, nausea, and vomiting. The acute phase occurs with encephalopathy, characterized by altered behaviour such as irritability or confusion and changes in consciousness, with lethargy, stupor, or coma. This is associated with multifocal or focal neurological deficits depending on the area involved in the demyelinating process. Progression of the disease usually takes place within days, with maximal deficits within 2 to 5 days. Intensive care management is required for 15% of children. Clinical recovery typically occurs over weeks.

Acute Disseminated Encephalomyelitis (ADEM) vs Multiple Sclerosis (MS)

Acute disseminated encephalomyelitis (ADEM) is a rare but serious neurological condition involving demyelinating disorders and brain lesions, often following a viral illness. It often strikes suddenly, causing inflammation in the brain and spinal cord, known as acute disseminated encephalomyelitis in neurology, leading to neurological deficits in the central nervous system. This can lead to symptoms like headaches, fever, neurological deficits, and even seizures. Historically, acute disseminated encephalomyelitis (ADEM) was first described in the 18th century and has since been linked to viral infections or vaccinations.

Acute Disseminated Encephalomyelitis (ADEM): Past, Present, and Future

Over the years, our understanding of ADEM has matured, though many aspects of the condition remain mysterious. What leads some individuals to develop the condition in the first place? Could it happen again? Why do some individuals make a full recovery while others have lasting impairment?

Acute Disseminated Encephalomyelitis: Current Perspectives

Acute disseminated encephalomyelitis (ADEM) is an immune-mediated central nervous system (CNS) disorder, characterized by polyfocal symptoms, encephalopathy and typical magnetic resonance imaging (MRI) findings, that especially affects young children. Advances in understanding CNS neuroimmune disorders as well as the association of myelin oligodendrocyte glycoprotein antibody (MOG-Ab) with both monophasic and recurrent forms of ADEM have led to new insights into its definition, management and outcome.

Acute disseminated encephalomyelitis

Acute disseminated encephalomyelitis (ADEM) is an acute multifocal demyelinating disease of the central nervous system that typically follows an infectious illness. Its clinical course in most cases is monophasic; however, relapsing ADEM is rarely seen, which poses a diagnostic challenge for distinguishing this disease from multiple sclerosis (MS). Although typically encountered in children, it also occurs in adults with disease characteristics slightly different from the pediatric cases. Formerly, ADEM occurred particularly often in children with measles. However, the illness most often follows a non-descript viral or even bacterial infectious illness.

Acute Disseminated Encephalomyelitis An Update

Acute disseminated encephalomyelitis (ADEM) is a monophasic autoimmune demyelinating disease of the central nervous system that typically follows a febrile infection or a vaccination. Children are predominantly affected.

ADEM: Acute Disseminated Encephalomyelitis - My Journey of Strength and Hope

I share my personal battle with Acute Disseminated Encephalomyelitis (ADEM), a rare neurological disorder that transformed my life and challenged my family in unimaginable ways. This book chronicles not only my struggles with the illness but also the unwavering support of my loved ones as we navigated the uncertainties of diagnosis, treatment, and recovery together.

Diagnostic odyssey of acute disseminated encephalomyelitis in children

An ADEM diagnosis is frequently challenging because the initial prodromal presentation is highly variable and non-specific, including symptoms such as fever, headache, and nausea.

Do Vaccines Cause Acute Disseminated Encephalomyelitis (ADEM)?

Older formulations of rabies vaccine did cause Acute Disseminated Encephalomyelitis (ADEM), but newer formulations of rabies vaccine have not been shown to cause ADEM, and rabies vaccine is not routinely recommended to the general population in the United States. Other vaccines that are currently routinely recommended to the general population in the U.S.* have not been shown to cause ADEM.

Fact Sheet

Acute Disseminated Encephalomyelitis (ADEM) is a rare inflammatory demyelinating disease of the central nervous system. ADEM is thought to be an autoimmune disorder in which the body’s immune system mistakenly attacks its own brain tissue, triggered by an environmental stimulus in genetically susceptible individuals. In most cases, ADEM is believed to be triggered by a response to an infection, or much less likely, to a vaccination. For this reason, ADEM has sometimes been referred to as post-infectious or post-immunization acute disseminated encephalomyelitis.

Seeing Beyond the Symptoms: How MRI Enhances Understanding and Management of Acute Disseminated Encephalomyelitis (ADEM)

When it comes to neurological disorders, Acute Disseminated Encephalomyelitis, or ADEM, may not be as widely recognized as other conditions like multiple sclerosis or stroke. However, its impact on those affected can be profound. ADEM is an inflammatory disorder that attacks the central nervous system, specifically targeting the brain and spinal cord. This can lead to a range of severe symptoms that disrupt everyday life.

She Was Having Bouts of Vision Loss. Why?

Early the next morning, he got his answer. McKeon wrote that they did still have her blood and, after receiving Gutman’s email, ran the test. Gutman immediately called the patient with the news. The young woman held her breath. Would she finally have an answer? Yes. They had found antibodies to the MOG protein in her blood. She had what was now known as MOG antibody disease, or MOGAD. MOGAD is rare, thought to affect 1 in 50,000 people, often starting in childhood.

Update on Acute Disseminated Encephalomyelitis in Children and Adolescents

Acute disseminated encephalomyelitis (ADEM) is an immune-mediated, inflammatory demyelinating disease of the central nervous system (CNS) that usually affects children and young adults after an infection or vaccination. The presence of several conditions mimicking ADEM, added to the lack of specific biomarkers, makes diagnosis potentially hard. Prompt diagnosis is necessary to start adequate treatment to improve the clinical course and long-term outcome. Because of its heterogeneity in both clinical presentation and course, challenges remain in establishing the most appropriate therapeutic approach in each patient. The aim of this review is to provide an update on management of this disease with a focus on acute treatment and to give suggestions for future research.

Warning of serious brain disorders in people with mild coronavirus symptoms

UK neurologists publish details of mildly affected or recovering Covid-19 patients with serious or potentially fatal brain conditions

Resources

Encephalitis International

Acute disseminated encephalomyelitis (ADEM) accounts for around 10% of all known cases of encephalitis. ADEM usually affects children and begins after a childhood rash (exanthema), other viral infections or immunisations. There is usually a latent period of days to two to three weeks before symptoms emerge. The illness has been poorly understood and a variety of terminologies are used to describe it, these including post-viral, post-infectious or para-infectious encephalitis.

Global Autoimmune Institute

Acute disseminated encephalomyelitis (ADEM) causes brief but widespread inflammation and demyelination (white matter tissue damage) of the brain and spinal cord. Unfortunately, reviewing the existing medical literature on the topic can prove challenging, given that different terms have been used to describe and define the disorder. “Typically, ADEM is considered a monophasic disorder, which is a disorder that has a single occurrence of one phase in a particular individual.” However, there is confusion over whether symptomatic recurrences are relapses of ADEM or if they are instead the presentation of other diseases with similar symptoms, such as multiple sclerosis.

Siegel Rare Neuroimmune Association

ADEM is believed to be triggered by a response to an infection, or much less likely, to a vaccination. For this reason, ADEM has sometimes been referred to as post-infectious or post-immunization acute disseminated encephalomyelitis.

BrainFacts.org

Acute disseminated encephalomyelitis (ADEM) is characterized by a brief but widespread attack of inflammation in the brain and spinal cord that damages myelin – the protective covering of nerve fibers. ADEM often follows viral or bacterial infections, or less often, vaccination for measles, mumps, or rubella. The symptoms of ADEM appear rapidly, beginning with encephalitis-like symptoms such as fever, fatigue, headache, nausea and vomiting, and in the most severe cases, seizures and coma.

Child Neurology Foundation

Acute Disseminated Encephalomyelitis (ADEM) is most likely an autoimmune disease caused by an infection. It causes symptoms of brain disturbance. Symptoms may include confusion, irritability, unusual sleepiness, and occasionally seizures. ADEM is very rare. It almost always happens after a child is sick. Children usually recover after a few weeks, but may have lasting symptoms. Usually it only happens once and does not occur again.

Children's Hospital of Philadelphia

ADEM is rare, affecting 1 in every 125,000 to 250,000 people worldwide each year. Children under 10 are more likely to be affected than older children and adults. It appears slightly more often in males. In most cases, ADEM is monophasic, meaning it only occurs once in a lifetime, but in some patients is can be the first attack of a relapsing disease.

Consultant360

ADEM is an uncommon acute neurologic condition that can be diagnosed with a careful history, appropriate laboratory evaluations, and MRI of the brain. Patients with ADEM need to have continued clinical and MRI follow-up to screen for early MS.

Physiopedia

It frequently has a monophasic course and a good functional recovery. Over the course of several weeks, patients progressively improve, with 50–70% achieving full recovery. However, multiphasic and recurrent forms have also been documented.

Radiopedia

Acute disseminated encephalomyelitis is thought to occur from a cross-reactivity in immunity to viral antigens, triggering a subsequent autoimmune response targeted to myelin autoantigens (eg, myelin basic protein, myelin oligodendrocyte protein, proteolipid protein) in the CNS. In approximately half of all confirmed cases, anti-MOG (myelin oligodendrocyte glycoprotein) immunoglobulin G antibodies can be identified (see MOGAD)

StatPearls

Acute disseminated encephalomyelitis (ADEM), also referred to as post-infectious encephalomyelitis, is an acute, rapidly progressive autoimmune process. This condition is characterized by demyelination in the brain and spinal cord as a result of inflammation that occurs in response to a preceding infection or immunization.