Asplenia

Overview

Asplenia means you have no spleen, or your spleen does not work properly. The spleen is a small organ in the upper left side of your belly. It helps filter blood and plays an important part in your immune system by fighting certain germs. Without a working spleen, you are at a higher risk of serious infections, but there are good ways to protect yourself.

Asplenia is uncommon. Doctors are not sure exactly how many people have it because some spleens stop working without being removed and the condition may go unnoticed for years.

It can affect people of any age. Some people are born without a spleen. Others have their spleen removed because of an injury or an illness, and some people lose spleen function because of a long-term health condition such as sickle cell disease.

Symptoms

Common symptoms

• Most people with asplenia do not have symptoms directly from the missing or non-working spleen.
• Symptoms usually come from an infection, and they can look like a normal cold, flu, or tummy bug at first.
• The danger is that an infection can become severe very quickly, so you should take any new symptoms seriously.

Symptoms in children

• Feeding poorly or not drinking enough fluids
• Unusually sleepy, floppy, or hard to wake
• Fast breathing, grunting, or working hard to breathe
• High fever with shaking chills

Symptoms in older adults

• Confusion, feeling weak, or suddenly dizzy
• A fall or a sudden loss of energy
• High fever with chills and aches
• Shortness of breath, chest pain, or a very fast heartbeat

Causes

Main causes

• Being born without a spleen, which is called congenital asplenia.
• Having the spleen surgically removed, often because of a serious injury, a blood disorder, or another medical condition.
• Having a spleen that stops working properly because of an illness such as sickle cell disease, coeliac disease, or long-term liver disease.

Risk factors

• Having a weakened immune system for another reason.
• Not being up to date with recommended vaccinations.
• Delaying medical care when an infection starts.
• Living or travelling in areas with a higher risk of certain infectious diseases.

When to see a doctor

See a doctor urgently if:

• See a doctor the same day if you develop a fever, chills, or feel suddenly unwell.
• Seek urgent care if you have a new cough, sore throat, ear pain, or tummy pain that is getting worse.
• If you are caring for a child with asplenia and they seem unusually sleepy, are breathing quickly, or are not drinking, get help the same day.

Book a routine appointment if:

• Make a routine appointment if you are due for vaccinations or a check-up with your GP or specialist.
• Ask for a review of your asplenia care plan at least once a year.
• Talk to your doctor before travelling so you can plan how to reduce your infection risk.

Diagnosis

Asplenia is usually found through imaging tests that show the spleen is missing, very small, or not working. Blood tests may also give clues. Sometimes asplenia is discovered after a serious infection, and sometimes it is found by chance during a scan for another reason.

Tests that may be done

• Blood tests, including a blood smear to look for changes in red blood cells that suggest the spleen is not working.
• An ultrasound of the belly, which is a painless scan using sound waves to look at your organs.
• A CT scan or MRI if your doctor needs more detailed images of the spleen and surrounding area.
• Tests to check how well your immune system is working, especially if the cause is unclear.

What to expect at your appointment

Your doctor will ask about your medical history, any past infections, and whether you have had any surgeries or injuries. They may gently press on your belly to check for tenderness, and they will arrange any tests you need. Most tests can be done at a hospital or imaging centre, and your doctor will explain the results at a follow-up appointment.

Treatment

There is no way to replace the spleen, but asplenia can be managed well. The main goals are to prevent infections, treat infections quickly when they happen, and make sure you and your family know the emergency plan.

Self-care at home

• Keep your vaccinations up to date as recommended by your doctor.
• Wash your hands often and try to avoid close contact with people who have active infections.
• Carry an alert card and wear a medical alert bracelet that says you have asplenia.
• Have a low threshold to contact medical care if you feel unwell, especially with a fever.
• Before travelling, ask your doctor about extra precautions or vaccinations you may need.

Medical treatments

Medical care focuses on prevention and early treatment. Your doctor may recommend a personalised vaccination schedule, an annual flu immunisation, and, in some cases, daily preventive antibiotics. If you develop an infection, you may need antibiotics quickly, and in a serious situation you may be admitted to hospital for treatment through a drip into your vein. Your doctor will give you a plan that is right for your age, health, and situation.

When is surgery considered?

Some people have surgery to remove the spleen, called a splenectomy. This might be needed because of a serious injury, a blood disorder, a tumour, or another underlying condition. The decision is made by a specialist team, and you will always be given a long-term infection prevention plan after the operation.

Living with this condition

You can live normally and stay active. The biggest change is making infection prevention part of your routine. Keep your vaccinations updated, know your emergency numbers, and make sure the people around you know about your condition, especially if you are ever too unwell to speak for yourself.

Lifestyle tips

• Always carry your asplenia alert card and a list of your current medicines and allergies.
• Put your local emergency number and your GP surgery number in your phone.
• Seek medical care early for fevers or signs of infection, and do not wait to see if it passes.
• Follow your specialist's advice before travelling, especially if you are going to a place where medical care may be harder to reach access.

Diet and exercise

A balanced, varied diet and regular movement can help support your overall health and immune system. There are no specific foods that replace the spleen's function, but eating well, staying hydrated, and being active can help you feel stronger and more resilient.

Mental health and emotional wellbeing

Living with a long-term health risk can sometimes cause anxiety or worry. It is normal to feel concerned, especially after an infection scare. It can help to talk to your GP, a counsellor, or a trusted friend about how you feel. If you ever feel overwhelmed, hopeless, or have thoughts of harming yourself, contact your local crisis line or emergency services immediately.

Prevention

Asplenia itself cannot always be prevented, but the serious complications of asplenia can often be prevented. The key steps are keeping your vaccinations up to date, taking any prescribed preventive treatment, and getting urgent medical help when an infection starts.

Vaccines

Your doctor will create a personal vaccination plan for you. This usually includes vaccines that protect against the types of bacteria that most commonly cause serious infections in people without a spleen. The exact schedule depends on your age, health, and whether your spleen was removed or is not working. Ask your GP or specialist which vaccines you need and when to have them.

Screening programmes

There is no routine screening for asplenia in the general population. If you are at higher risk because of an underlying condition, your doctor may use imaging tests such as ultrasound to check your spleen. Otherwise, the main focus is regular reviews of your infection prevention plan.

Complications

If left untreated

• Overwhelming post-splenectomy infection, or OPSI, is a severe bacterial infection that can come on very quickly and becomes life-threatening very fast.
• Pneumonia, which is an infection of the lungs that can make it hard to breathe.
• Sepsis, a life-threatening condition where the body's response to infection damages its own tissues and organs.
• Meningitis, an infection of the membranes around the brain and spinal cord that can cause severe headaches, stiff neck, and confusion. Early treatment is essential to prevent these complications from becoming serious.

Long-term outlook

With a clear care plan and the right habits, most people with asplenia live long, active, and full lives. The risk of serious infection is real, but it can be greatly reduced. The most important thing is to stay up to date with vaccines, carry your alert card, and never wait to get help if you suddenly feel unwell.

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