About Pernicious Anemia
Pernicious anemia is caused by autoimmune inflammation in the stomach and the inability to absorb vitamin B12 in the small intestine. There are two main causes of pernicious anemia:
- Autoimmune cause: In most cases, the body's immune system mistakenly attacks and destroys the cells in the stomach that produce a substance called intrinsic factor. Intrinsic factor is necessary for the absorption of vitamin B12 in the small intestine.
- Genetic cause: Some individuals may have a genetic predisposition to developing pernicious anemia.
As for the risk factors, they can be categorized into non-modifiable and modifiable factors:
Non-modifiable risk factors are factors that cannot be changed or controlled. These include:
- Age: Pernicious anemia is more common in individuals over the age of 60.
- Family history: Having a family member with pernicious anemia increases the risk.
Modifiable risk factors are factors that can be influenced or changed. These include:
- Autoimmune disorders: Certain autoimmune endocrine diseases like type 1 diabetes mellitus, hypoparathyroidism, Addisons disease, and Graves disease are associated with an increased risk of pernicious anemia.
- Diet: A lack of vitamin B12 in the diet can contribute to vitamin B12 deficiency anemia, which includes pernicious anemia.
It's important to note that these risk factors increase the likelihood of developing pernicious anemia but do not guarantee its occurrence. If you suspect you may have pernicious anemia or are concerned about your risk factors, it's best to consult with your healthcare professional for proper evaluation and guidance.
The most common early symptoms of pernicious anemia include fatigue, weakness, and headaches. As the condition progresses or becomes more severe, other symptoms may occur, such as:
- Chest pain
- Weight loss
- Pale skin
- Unsteady gait
- Numbness in the arms and legs (peripheral neuropathy)
- Muscle weakness
- Depression
- Memory loss
- Dementia
Additionally, other symptoms of vitamin B12 deficiency, including those due to pernicious anemia, may include nausea and vomiting, confusion, constipation, loss of appetite, and heartburn.
It's important to note that symptoms can vary from person to person and not everyone will experience all of these symptoms. If you suspect you may have pernicious anemia or are experiencing any concerning symptoms, it's best to consult with a healthcare professional for proper evaluation and diagnosis.
To diagnose pernicious anemia, healthcare providers commonly perform the following examinations, tests, and procedures:
- Physical exam: During the physical exam, the healthcare provider will look for signs like pale skin (pallor), yellowish skin or eyes (jaundice), a mooth or swollen tongue (glossitis), and any neurological symptoms, such as numbness or tingling in the hands and feet. These symptoms are often related to low vitamin B12 levels.
- Lab tests: Specific lab tests may be recommended, such as a blood draw, to check for indicators of pernicious anemia. These tests may include:
- Complete blood count to check hemoglobin levels.
- Vitamin B12 level test to assess for deficiency.
- Intrinsic factor and parietal cell antibodies: These tests check for antibodies against intrinsic factor and parietal cells in the stomach. These antibodies are associated with pernicious anemia.
Additional examinations, tests, and procedures may be performed based upon initial results or individual factors. Examples of these include:
- Bone marrow test: A bone marrow test, which can be done through aspiration or biopsy, may be carried out to examine bone marrow cells for signs of pernicious anemia.
It's important to consult with your healthcare provider to discuss which specific examinations, tests, and procedures are appropriate for your individual situation.
The goals of treatment for pernicious anemia are:
- Correcting vitamin B12 deficiency: The main treatment for pernicious anemia involves replenishing vitamin B12 levels in the body. This is typically done through vitamin B12 injections, which can be given daily or weekly until the B12 levels return to a healthy range. These injections can be administered by a healthcare professional or self-administered at home.
- Improving blood cell production: Vitamin B12 injections stimulate the bone marrow to create new red blood cells, which helps increase the hemoglobin level and improve the blood's ability to transport oxygen. This helps relieve symptoms of anemia and improve a person's quality of life.
- Long-term management: After achieving healthy vitamin B12 levels, oral doses of B12 supplements may be recommended as a maintenance treatment. However, depending on the individual's ability to absorb vitamin B12, injections may still be necessary as the sole treatment for pernicious anemia.
It is important to note that these treatment goals may vary depending on the severity of the condition and individual factors. It is best to consult with a healthcare professional who can recommend the most appropriate treatment plan for each person.
Medication dosing may be affected by many factors. Check with your health care professional about dosing for your individual situation. Side effects can occur. Check with your health care professional or read the information provided with your medication for side effect information.