Introduction 

Evans syndrome is a rare autoimmune condition where the body’s immune system mistakenly attacks its own blood cells. This can lead to low levels of red blood cells in the body, resulting in fatigue and overall weakness. It is a complex condition that often requires long-term management. As the condition is so rare, finding out what it is can take a while.¹ Yet, despite being unfamiliar to many, growing awareness and research into its epidemiology (the study of how often it occurs and who it affects) is helping more people get the care they need. In this article, we will go over the basics of Evans Syndrome, how rare it is, and offer tips on how to live well with this condition.

What happens in evans syndrome? 

Evans syndrome occurs when your immune system, which usually stops you from getting sick, starts to attack your own blood cells. It mostly targets:

• Red blood cells: These cells bring oxygen around. When they are destroyed, you have fewer red blood cells (anaemia), which makes you feel tired, look pale, and get short of breath
• Platelets: These are needed for blood clotting. Not having enough can cause you to bruise easily and bleed more from your gums or nose
• White blood cells (neutrophils): They help fight infections. When they are low, you may get a lot of colds, fevers, or infections. Evans Syndrome, linked with white blood cells is less common than when linked to red blood cells and platelets¹

How rare is it? 

In children

Evans syndrome is a very rare condition. To grasp it better, there was a nationwide study done in Denmark to look at the condition in children. Researchers reviewed health records from 1981 to 2015 and found that 21 children under age 13 years had been diagnosed with Evans syndrome during that time, showing how rare the condition truly is. In 2015, around 19 children per million were living with Evans syndrome.

To understand the impact of the disease, the researchers compared these children with others from the general population, and with children who had one of the two conditions, either autoimmune hemolytic anemia or immune thrombocytopenia. They found that children with Evans syndrome had a 22 times greater risk of death than children from the general population, and also a higher risk than children with one of the autoimmune blood disorders listed above.

Despite the long study period, the researchers concluded that Evans Syndrome in children is not common. As it is very rare, it’s tough to draw firm conclusions.² This study is a reminder that rare diseases like Evans syndrome need more attention to improve outcomes and support families living with these complex conditions.

In adults 

In addition, another recent, large nationwide study in Denmark looked at 242 adults diagnosed with Evans syndrome, between the years 1977 and 2017, to better understand how common the condition is and how it affects patients. The average age at diagnosis was about 58 years and around one in four had secondary Evans Syndrome, meaning it was linked to another illness such as an autoimmune disease.

On average, people lived about seven years after they were diagnosed, but outcomes varied. Those with primary Evans Syndrome, which is not connected to another disease, tended to do better, living around eleven years on average. People with secondary Evans Syndrome faced more complex health challenges, and their condition progressed more quickly. The most common causes of death were serious bleeding, infections, and haematological cancer.

This study highlighted why it is key to spot a disease early, watch it closely, and offer tailored care. While Evans syndrome is a rare condition that can be serious, understanding its patterns helps doctors provide better support and treatment. The study also encourages more international research, so that anyone who has Evans Syndrome in the future might get better care and live a better life.³

Diagnosis

When identifying Evans Syndrome, doctors would start by checking for any possible risk factors such as infections, recent vaccinations, or a family history of immune disorders, followed by a physical examination. Blood tests such as a positive Direct Antiglobulin Test (DAT) may be done to confirm that the immune system is attacking red blood cells. However, the rarity of the condition poses a major challenge. Many doctors may not immediately conclude Evans syndrome at first sight of symptoms. Instead, it is usually diagnosed by ruling out other conditions, a process known as “diagnosis of exclusion.” This means you may often go through multiple tests and even misdiagnoses before getting the right diagnosis.^1,4

While that might sound frustrating, it’s important to know that this careful approach helps ensure the diagnosis is accurate, and that the right treatment is given. Once Evans Syndrome is identified, doctors can tailor care to your specific needs, and through better research, this can lead to better outcomes and support.³

Living with evans syndrome 

Treatment and management

Steroids like prednisolone or prednisone are often the first choice in treating Evans Syndrome. They help stop a type of immune cells, called macrophages, from attacking red blood cells and platelets. Intravenous Immunoglobulin is another form of treatment. It is a concentrated form of antibodies taken from human donors, and helps calm the immune system by blocking certain receptors on macrophages that attack blood cells. Rituximab is a medication that aims at specific immune cells, called B cells. It’s often used as a second line of treatment, so this is in the case that steroids did not work for you, or if your symptoms come back after initial treatment.⁴

Regular blood tests and having checkups are key to make sure doctors are up to date with what is going on with your body, so they can make sure you are being given the right treatment, and are given the right level of care and support.

Impact on day-to-day life

Evans Syndrome may cause you to have relapses often, high stress regarding treatments, and increased risk of infection or thrombosis.⁵ You could feel tired or notice you bruise more easily, or get short of breath. These factors may impact how you live each day, and can oftentimes be exhausting or feel scary, but help is always available through various treatments and support.

FAQs

Has the number of cases increased over time?

Yes. The Danish study looking at adults between the years 1977 and 2017, found that over the study period, both the rate of Evans Syndrome occurring (incidence) and how common it is (prevalence) has increased over time. By 2016, the annual incidence had increased to 1.8 cases per million person-years, and the overall prevalence reached 21.3 cases per million people. This increase could be partly due to greater awareness and reduced cost of lab tests, that have enhanced accuracy in identifying Evans Syndrome. However, despite this increase, the condition still remains to be extremely rare, and we need more studies to understand it well.³

Is there a cure?

No, sadly not as of yet. However, there are many ways to treat and manage Evans Syndrome, such as steroids, intravenous immunoglobulin and rituximab. More studies and tests on Evans Syndrome are needed to improve the long-term response to the condition, and potentially find a cure.³

How can I manage living with Evans Syndrome?

If you have been diagnosed with Evans Syndrome, it is important to stay up to date with your regular checkups. This allows doctors to keep a track of your condition and give you the right treatment that you need. You should also keep an eye on your daily symptoms, like if you are feeling tired, getting bruises or infections. Also ensure that you are giving your body lots of rest. 

Summary 

Evans Syndrome is a rare autoimmune condition, which is when the body’s immune system mistakenly attacks its own blood cells. It can affect red blood cells, platelets, and sometimes, white blood cells, causing symptoms like tiredness, easy bruising, or frequent infections. Although it can be challenging, it’s important to know that Evans Syndrome is manageable with the right care. There are a range of different treatment options available such as steroids or intravenous immunoglobulin. While the number of cases of Evans Syndrome has increased over time, the condition still remains extremely rare and this can make it trickier for doctors to make a diagnosis the first time round. That is why ongoing research is crucial to finding out more about the epidemiology of this condition, which will lead to better outcomes and support. Living with Evans Syndrome can feel scary, hard and overwhelming, but you need to know that you are not alone, and help is available. With increased research on the condition, doctors will be able to provide you with the support and treatment that works best for you.