Iron-Deficiency Anaemia vs Anaemia of Chronic Disease: How to Tell Them Apart

Iron-deficiency anaemia and anaemia of chronic disease are two common types of anaemia, but they have different causes and treatment approaches. Understanding the differences can help you and your healthcare provider determine the best course of action.

What is iron-deficiency anaemia?

Iron-deficiency anaemia occurs when your body lacks enough iron to produce adequate levels of haemoglobin, the protein in red blood cells that carries oxygen. This can result from insufficient iron intake, poor absorption, or blood loss. Common symptoms include fatigue, weakness, and pale skin.

What is anaemia of chronic disease?

Anaemia of chronic disease, also known as anaemia of inflammation, is typically associated with chronic illnesses such as infections, autoimmune diseases, or cancer. In this condition, inflammation interferes with the body's ability to use stored iron effectively, leading to reduced haemoglobin levels. Symptoms often overlap with those of the underlying chronic condition.

Key differences in lab results

To differentiate between these two types of anaemia, healthcare providers often look at specific lab results:

• Serum ferritin: This measures the amount of stored iron in your body. Low ferritin levels suggest iron-deficiency anaemia, while normal or high levels can indicate anaemia of chronic disease.
• Total iron-binding capacity (TIBC): This test measures the blood's capacity to bind iron with transferrin, a protein that transports iron. High TIBC is often seen in iron-deficiency anaemia, whereas it is usually normal or low in anaemia of chronic disease.
• C-reactive protein (CRP) or erythrocyte sedimentation rate (ESR): These markers of inflammation can be elevated in anaemia of chronic disease due to underlying inflammation.

Causes and risk factors

• Iron-deficiency anaemia: Causes include inadequate dietary iron, gastrointestinal bleeding, menstruation, pregnancy, and conditions affecting iron absorption like celiac disease.
• Anaemia of chronic disease: This is linked to chronic conditions such as rheumatoid arthritis, chronic kidney disease, and long-standing infections. The body's inflammatory response to these conditions can alter iron metabolism.

Treatment approaches

• Iron-deficiency anaemia: Treatment usually involves iron supplements and dietary changes to increase iron intake. Addressing the underlying cause of iron deficiency, such as treating a bleeding ulcer, is also crucial.
• Anaemia of chronic disease: Treatment focuses on managing the underlying condition. Iron supplements are generally not effective unless there is a co-existing iron deficiency.

Frequently asked questions

Q: Can I have both types of anaemia at the same time?
A: Yes, it is possible to have both iron-deficiency anaemia and anaemia of chronic disease concurrently. It's important for healthcare providers to evaluate all potential causes.

Q: How is anaemia diagnosed?
A: Anaemia is diagnosed through blood tests that measure haemoglobin, haematocrit, and other related markers. Further tests may be needed to determine the specific type of anaemia.

Q: Can diet alone correct iron-deficiency anaemia?
A: While improving dietary iron intake can help, supplements are often needed to quickly replenish iron levels, especially if the deficiency is significant.

When to see a doctor

If you experience symptoms such as persistent fatigue, weakness, or shortness of breath, it is important to consult a healthcare provider. These symptoms could indicate anaemia or another underlying condition that requires attention. Regular monitoring and follow-up with your healthcare provider are essential to manage any type of anaemia effectively.

It is important to discuss any concerns or symptoms with your healthcare provider, as they can provide personalized advice and treatment options.