Megaloblastic anemia facts for kids

Megaloblastic anemia is a type of anemia, a condition where your body doesn't have enough healthy red blood cells. These special cells carry oxygen from your lungs to every part of your body. When you have megaloblastic anemia, your red blood cells are larger than normal and don't work as well.

This kind of anemia often happens when your body doesn't get enough important vitamins. The two main vitamins involved are Vitamin B12 and folic acid (also known as Vitamin B9). Both of these vitamins are super important for making new, healthy cells, especially red blood cells.

What Causes Megaloblastic Anemia?

Megaloblastic anemia is usually caused by a lack of Vitamin B12 or folic acid. These vitamins are essential for your body to make DNA, which is like the instruction manual for building new cells. Without enough of them, your body can't make red blood cells properly.

Lack of Vitamin B12

Not having enough Vitamin B12 is a common cause. This can happen for a few reasons:

• Not eating enough B12-rich foods: Vitamin B12 is mostly found in animal products like meat, fish, eggs, and dairy. People who follow a vegan diet (no animal products) might not get enough unless they take supplements.
• Pernicious anemia: This is an autoimmune disease where your body's immune system attacks cells in your stomach. These cells normally make a protein called "intrinsic factor," which helps your body absorb Vitamin B12 from food. Without intrinsic factor, you can't absorb B12, even if you eat enough of it.
• Stomach or gut problems: Some diseases or surgeries that affect your stomach or small intestine can make it hard for your body to absorb Vitamin B12.

Lack of Folic Acid

Folic acid is another key vitamin. Here's why you might not have enough:

• Not eating enough folate-rich foods: Folic acid is found in leafy green vegetables, fruits, nuts, beans, and fortified cereals. If your diet doesn't include enough of these, you might become deficient.
• Certain medical conditions: Some conditions, like celiac disease or Crohn's disease, can make it harder for your body to absorb folic acid.
• Some medicines: Certain medications can interfere with how your body uses folic acid.
• Increased need: Pregnant people need more folic acid because it's important for the baby's development. If they don't get enough, they can develop megaloblastic anemia.

What Are the Symptoms?

The symptoms of megaloblastic anemia are similar to other types of anemia, but they can also include some specific signs. Because your body isn't getting enough oxygen, you might feel:

• Tired and weak: This is the most common symptom. You might feel like you have no energy.
• Pale skin: Your skin might look lighter than usual because you have fewer red blood cells.
• Shortness of breath: You might feel breathless, especially when you exercise.
• Dizziness: You might feel lightheaded or dizzy.
• Headaches: Frequent headaches can be a sign.

There are also some symptoms specific to Vitamin B12 deficiency:

• Tingling or numbness: You might feel a "pins and needles" sensation in your hands or feet.
• Balance problems: You might have trouble walking steadily.
• Memory problems: You might find it harder to remember things or concentrate.
• Sore tongue: Your tongue might feel smooth, red, and painful.

How Is It Diagnosed?

If a doctor thinks you might have megaloblastic anemia, they will usually do a few tests:

• Blood tests: A simple blood test can check the size and number of your red blood cells. In megaloblastic anemia, the red blood cells are larger than normal. The doctor will also check your Vitamin B12 and folic acid levels.
• Bone marrow biopsy: In some cases, if the diagnosis isn't clear, a doctor might take a small sample of your bone marrow (the spongy tissue inside your bones where blood cells are made) to look at it under a microscope.

How Is It Treated?

The good news is that megaloblastic anemia is often easy to treat once the cause is found.

• Vitamin supplements: If you have a Vitamin B12 deficiency, you might need Vitamin B12 shots or high-dose supplements. If it's a folic acid deficiency, you'll take folic acid supplements.
• Diet changes: Your doctor or a dietitian might suggest adding more foods rich in Vitamin B12 or folic acid to your diet.
• Treating underlying conditions: If another medical condition is causing the deficiency, treating that condition will also help. For example, if you have pernicious anemia, you'll need lifelong Vitamin B12 treatment.

With proper treatment, most people with megaloblastic anemia feel much better and their red blood cell levels return to normal.

See also

In Spanish: Anemia megaloblástica para niños